./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_08.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_two_index_08.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 f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:14:52,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:14:52,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:14:52,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:14:52,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:14:52,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:14:52,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:14:52,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:14:52,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:14:52,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:14:52,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:14:52,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:14:52,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:14:52,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:14:52,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:14:52,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:14:52,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:14:52,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:14:52,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:14:52,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:14:52,658 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:14:52,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:14:52,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:14:52,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:14:52,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:14:52,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:14:52,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:14:52,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:14:52,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:14:52,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:14:52,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:14:52,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:14:52,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:14:52,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:14:52,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:14:52,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:14:52,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:14:52,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:14:52,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:14:52,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:14:52,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:14:52,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:14:52,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:14:52,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:14:52,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:14:52,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:14:52,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:14:52,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:14:52,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:14:52,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:14:52,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:14:52,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:14:52,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:14:52,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:14:52,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:14:52,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:14:52,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac [2022-07-19 09:14:52,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:14:52,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:14:52,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:14:52,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:14:52,921 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:14:52,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_08.i [2022-07-19 09:14:52,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c693a948/2c4bbdb172014500951ef04ee3bab8aa/FLAG4e5462b4e [2022-07-19 09:14:53,341 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:14:53,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i [2022-07-19 09:14:53,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c693a948/2c4bbdb172014500951ef04ee3bab8aa/FLAG4e5462b4e [2022-07-19 09:14:53,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c693a948/2c4bbdb172014500951ef04ee3bab8aa [2022-07-19 09:14:53,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:14:53,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:14:53,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:14:53,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:14:53,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:14:53,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467c4b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53, skipping insertion in model container [2022-07-19 09:14:53,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:14:53,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:14:53,518 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_two_index_08.i[814,827] [2022-07-19 09:14:53,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:14:53,539 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:14:53,547 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_two_index_08.i[814,827] [2022-07-19 09:14:53,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:14:53,561 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:14:53,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53 WrapperNode [2022-07-19 09:14:53,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:14:53,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:14:53,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:14:53,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:14:53,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,587 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-19 09:14:53,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:14:53,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:14:53,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:14:53,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:14:53,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:14:53,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:14:53,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:14:53,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:14:53,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 09:14:53,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:14:53,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:53,638 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 09:14:53,640 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 09:14:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:14:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:14:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:14:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:14:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:14:53,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:14:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:14:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:14:53,715 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:14:53,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:14:53,848 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:14:53,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:14:53,853 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:14:53,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:14:53 BoogieIcfgContainer [2022-07-19 09:14:53,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:14:53,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:14:53,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:14:53,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:14:53,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:14:53" (1/3) ... [2022-07-19 09:14:53,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41566a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:14:53, skipping insertion in model container [2022-07-19 09:14:53,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (2/3) ... [2022-07-19 09:14:53,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41566a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:14:53, skipping insertion in model container [2022-07-19 09:14:53,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:14:53" (3/3) ... [2022-07-19 09:14:53,872 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2022-07-19 09:14:53,892 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:14:53,892 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:14:53,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:14:53,925 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@7057d12, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a97d661 [2022-07-19 09:14:53,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:14:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) 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) [2022-07-19 09:14:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 09:14:53,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:53,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:53,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-07-19 09:14:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706620569] [2022-07-19 09:14:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:54,068 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 09:14:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706620569] [2022-07-19 09:14:54,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706620569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:14:54,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:14:54,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:14:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002763219] [2022-07-19 09:14:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:14:54,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:14:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:14:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:14:54,103 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) 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) Second operand has 3 states, 3 states have (on average 3.0) 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) [2022-07-19 09:14:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:54,145 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-07-19 09:14:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:14:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) 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 [2022-07-19 09:14:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:54,152 INFO L225 Difference]: With dead ends: 28 [2022-07-19 09:14:54,152 INFO L226 Difference]: Without dead ends: 12 [2022-07-19 09:14:54,156 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 09:14:54,158 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:54,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:14:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-19 09:14:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-19 09:14:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-07-19 09:14:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-19 09:14:54,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-07-19 09:14:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:54,199 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-19 09:14:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) 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) [2022-07-19 09:14:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-19 09:14:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 09:14:54,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:54,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:14:54,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-07-19 09:14:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788830589] [2022-07-19 09:14:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:54,274 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 09:14:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:54,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788830589] [2022-07-19 09:14:54,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788830589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764411936] [2022-07-19 09:14:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:54,277 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 09:14:54,300 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 09:14:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:54,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 09:14:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:54,369 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 09:14:54,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:14:54,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764411936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:14:54,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:14:54,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-19 09:14:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808173402] [2022-07-19 09:14:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:14:54,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:14:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:14:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:14:54,377 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-19 09:14:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:54,409 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-19 09:14:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:14:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2022-07-19 09:14:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:54,411 INFO L225 Difference]: With dead ends: 24 [2022-07-19 09:14:54,411 INFO L226 Difference]: Without dead ends: 18 [2022-07-19 09:14:54,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:14:54,413 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:54,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:14:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-19 09:14:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-07-19 09:14:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 09:14:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-19 09:14:54,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-07-19 09:14:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:54,419 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-19 09:14:54,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-07-19 09:14:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-19 09:14:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:14:54,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:54,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:54,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 09:14:54,638 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 09:14:54,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:54,641 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2022-07-19 09:14:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:54,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900580260] [2022-07-19 09:14:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:54,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:14:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900580260] [2022-07-19 09:14:54,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900580260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671454657] [2022-07-19 09:14:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:54,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:54,675 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 09:14:54,676 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 09:14:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:14:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:14:54,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:14:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:14:54,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671454657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:14:54,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:14:54,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:14:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268706623] [2022-07-19 09:14:54,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:14:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:14:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:14:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:14:54,750 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-07-19 09:14:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:54,778 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-07-19 09:14:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:14:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 11 [2022-07-19 09:14:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:54,780 INFO L225 Difference]: With dead ends: 36 [2022-07-19 09:14:54,781 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 09:14:54,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 09:14:54,782 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:14:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 09:14:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-07-19 09:14:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 09:14:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 09:14:54,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-07-19 09:14:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:54,790 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 09:14:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-07-19 09:14:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 09:14:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 09:14:54,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:54,793 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:54,810 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 09:14:55,010 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 09:14:55,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2022-07-19 09:14:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:55,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84623131] [2022-07-19 09:14:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 09:14:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84623131] [2022-07-19 09:14:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84623131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478495845] [2022-07-19 09:14:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:14:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:55,071 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 09:14:55,088 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 09:14:55,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:14:55,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:14:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:14:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:14:55,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:14:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:14:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478495845] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:14:55,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:14:55,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-19 09:14:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152526446] [2022-07-19 09:14:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:14:55,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 09:14:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 09:14:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-19 09:14:55,210 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2022-07-19 09:14:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:55,266 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-07-19 09:14:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:14:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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 15 [2022-07-19 09:14:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:55,268 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:14:55,268 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 09:14:55,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-19 09:14:55,269 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:55,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:14:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 09:14:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2022-07-19 09:14:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2022-07-19 09:14:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-19 09:14:55,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2022-07-19 09:14:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:55,274 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-19 09:14:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2022-07-19 09:14:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-19 09:14:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 09:14:55,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:55,274 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:55,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 09:14:55,497 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 09:14:55,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2022-07-19 09:14:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:55,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321971475] [2022-07-19 09:14:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 09:14:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321971475] [2022-07-19 09:14:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321971475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028923198] [2022-07-19 09:14:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:14:55,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:55,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:55,605 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 09:14:55,606 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 09:14:55,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:14:55,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:14:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:14:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 09:14:55,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:14:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 09:14:55,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028923198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:14:55,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:14:55,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 09:14:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509065269] [2022-07-19 09:14:55,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:14:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:14:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:14:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:14:55,740 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 09:14:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:55,820 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-07-19 09:14:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:14:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-07-19 09:14:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:55,821 INFO L225 Difference]: With dead ends: 85 [2022-07-19 09:14:55,821 INFO L226 Difference]: Without dead ends: 79 [2022-07-19 09:14:55,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:14:55,822 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:55,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:14:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-19 09:14:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2022-07-19 09:14:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2022-07-19 09:14:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-19 09:14:55,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2022-07-19 09:14:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:55,828 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-19 09:14:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 09:14:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-19 09:14:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 09:14:55,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:55,828 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:55,853 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 09:14:56,053 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 09:14:56,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2022-07-19 09:14:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301099849] [2022-07-19 09:14:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 09:14:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301099849] [2022-07-19 09:14:56,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301099849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51660248] [2022-07-19 09:14:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:14:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:56,200 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 09:14:56,201 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 09:14:56,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:14:56,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:14:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:14:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 09:14:56,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:14:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 09:14:56,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51660248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:14:56,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:14:56,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-07-19 09:14:56,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469408430] [2022-07-19 09:14:56,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:14:56,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 09:14:56,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:56,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 09:14:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 09:14:56,586 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 09:14:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:56,722 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-07-19 09:14:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 09:14:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2022-07-19 09:14:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:56,723 INFO L225 Difference]: With dead ends: 142 [2022-07-19 09:14:56,723 INFO L226 Difference]: Without dead ends: 124 [2022-07-19 09:14:56,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 09:14:56,725 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:56,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 78 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:14:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-19 09:14:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2022-07-19 09:14:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2022-07-19 09:14:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-07-19 09:14:56,731 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2022-07-19 09:14:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:56,731 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-07-19 09:14:56,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 09:14:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-07-19 09:14:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 09:14:56,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:56,732 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:56,763 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 09:14:56,947 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 09:14:56,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2022-07-19 09:14:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624492419] [2022-07-19 09:14:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:56,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-07-19 09:14:57,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624492419] [2022-07-19 09:14:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624492419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696735474] [2022-07-19 09:14:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:14:57,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:57,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:57,139 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 09:14:57,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:18:51,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-19 09:18:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:18:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:18:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:18:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 09:18:51,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:18:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 09:18:52,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696735474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:18:52,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:18:52,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 84 [2022-07-19 09:18:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440128745] [2022-07-19 09:18:52,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:18:52,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-19 09:18:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:18:52,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-19 09:18:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 09:18:52,629 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 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) [2022-07-19 09:18:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:18:52,948 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2022-07-19 09:18:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 09:18:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 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 57 [2022-07-19 09:18:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:18:52,949 INFO L225 Difference]: With dead ends: 227 [2022-07-19 09:18:52,950 INFO L226 Difference]: Without dead ends: 206 [2022-07-19 09:18:52,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3765 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 09:18:52,952 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 411 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:18:52,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 109 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:18:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-19 09:18:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 111. [2022-07-19 09:18:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 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) [2022-07-19 09:18:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-19 09:18:52,964 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2022-07-19 09:18:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:18:52,964 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-19 09:18:52,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 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) [2022-07-19 09:18:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-19 09:18:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-19 09:18:52,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:18:52,969 INFO L195 NwaCegarLoop]: trace histogram [81, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:18:53,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:18:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:18:53,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:18:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:18:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -217898473, now seen corresponding path program 6 times [2022-07-19 09:18:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:18:53,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785734126] [2022-07-19 09:18:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:18:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:18:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:18:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2022-07-19 09:18:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:18:53,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785734126] [2022-07-19 09:18:53,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785734126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:18:53,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18859614] [2022-07-19 09:18:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:18:53,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:18:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:18:53,623 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) [2022-07-19 09:18:53,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process