./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/dijkstra-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/nla-digbench/dijkstra-u.c -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 b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:57:13,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:57:13,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:57:13,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:57:13,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:57:13,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:57:13,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:57:13,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:57:13,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:57:13,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:57:13,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:57:13,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:57:13,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:57:13,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:57:13,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:57:13,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:57:13,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:57:13,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:57:13,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:57:13,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:57:13,474 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:57:13,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:57:13,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:57:13,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:57:13,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:57:13,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:57:13,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:57:13,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:57:13,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:57:13,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:57:13,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:57:13,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:57:13,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:57:13,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:57:13,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:57:13,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:57:13,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:57:13,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:57:13,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:57:13,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:57:13,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:57:13,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:57:13,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:57:13,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:57:13,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:57:13,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:57:13,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:57:13,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:57:13,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:57:13,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:57:13,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:57:13,520 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:57:13,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:57:13,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:57:13,522 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:57:13,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:57:13,523 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:57:13,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:57:13,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:57:13,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:57:13,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:57:13,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:57:13,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:57:13,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:57:13,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:57:13,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:57:13,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:57:13,525 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:57:13,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:57:13,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:57:13,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 [2022-07-13 15:57:13,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:57:13,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:57:13,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:57:13,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:57:13,769 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:57:13,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/dijkstra-u.c [2022-07-13 15:57:13,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d006900/79106481e5b1439d8e0f68ec7a1ded9a/FLAG288fefe80 [2022-07-13 15:57:14,120 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:57:14,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/dijkstra-u.c [2022-07-13 15:57:14,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d006900/79106481e5b1439d8e0f68ec7a1ded9a/FLAG288fefe80 [2022-07-13 15:57:14,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d006900/79106481e5b1439d8e0f68ec7a1ded9a [2022-07-13 15:57:14,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:57:14,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:57:14,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:57:14,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:57:14,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:57:14,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c05004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14, skipping insertion in model container [2022-07-13 15:57:14,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:57:14,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:57:14,672 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/nla-digbench/dijkstra-u.c[525,538] [2022-07-13 15:57:14,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:57:14,695 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:57:14,703 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/nla-digbench/dijkstra-u.c[525,538] [2022-07-13 15:57:14,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:57:14,725 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:57:14,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14 WrapperNode [2022-07-13 15:57:14,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:57:14,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:57:14,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:57:14,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:57:14,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,749 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-13 15:57:14,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:57:14,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:57:14,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:57:14,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:57:14,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:57:14,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:57:14,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:57:14,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:57:14,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (1/1) ... [2022-07-13 15:57:14,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:57:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:14,812 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) [2022-07-13 15:57:14,828 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 [2022-07-13 15:57:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:57:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:57:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:57:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:57:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:57:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:57:14,901 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:57:14,902 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:57:15,051 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:57:15,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:57:15,060 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 15:57:15,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:57:15 BoogieIcfgContainer [2022-07-13 15:57:15,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:57:15,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:57:15,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:57:15,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:57:15,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:57:14" (1/3) ... [2022-07-13 15:57:15,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5437c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:57:15, skipping insertion in model container [2022-07-13 15:57:15,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:57:14" (2/3) ... [2022-07-13 15:57:15,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5437c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:57:15, skipping insertion in model container [2022-07-13 15:57:15,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:57:15" (3/3) ... [2022-07-13 15:57:15,068 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2022-07-13 15:57:15,078 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:57:15,078 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:57:15,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:57:15,131 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@231e142e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c93c655 [2022-07-13 15:57:15,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:57:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:57:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:57:15,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:15,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:15,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1104964382, now seen corresponding path program 1 times [2022-07-13 15:57:15,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:15,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606374325] [2022-07-13 15:57:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:57:15,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:15,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606374325] [2022-07-13 15:57:15,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606374325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:15,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:15,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:57:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562059102] [2022-07-13 15:57:15,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:57:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:57:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:57:15,319 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:15,337 INFO L93 Difference]: Finished difference Result 53 states and 93 transitions. [2022-07-13 15:57:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:57:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 15:57:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:15,349 INFO L225 Difference]: With dead ends: 53 [2022-07-13 15:57:15,350 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 15:57:15,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:57:15,356 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:15,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:57:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 15:57:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 15:57:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:57:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-07-13 15:57:15,391 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-07-13 15:57:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:15,391 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-07-13 15:57:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-07-13 15:57:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:57:15,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:15,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:15,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:57:15,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2095754447, now seen corresponding path program 1 times [2022-07-13 15:57:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:15,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682151272] [2022-07-13 15:57:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:57:15,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682151272] [2022-07-13 15:57:15,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682151272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:15,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:15,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:57:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663034216] [2022-07-13 15:57:15,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:57:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:57:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:15,660 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:17,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:19,216 INFO L93 Difference]: Finished difference Result 59 states and 88 transitions. [2022-07-13 15:57:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:57:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 15:57:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:19,218 INFO L225 Difference]: With dead ends: 59 [2022-07-13 15:57:19,218 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 15:57:19,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:57:19,219 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:19,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 15:57:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 15:57:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-07-13 15:57:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 15:57:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2022-07-13 15:57:19,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 11 [2022-07-13 15:57:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:19,254 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2022-07-13 15:57:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2022-07-13 15:57:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 15:57:19,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:19,255 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:19,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:57:19,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash 975763084, now seen corresponding path program 1 times [2022-07-13 15:57:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:19,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709759738] [2022-07-13 15:57:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:57:19,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:19,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709759738] [2022-07-13 15:57:19,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709759738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:19,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:19,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:57:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411072800] [2022-07-13 15:57:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:57:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:57:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:19,368 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:21,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:23,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 15:57:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:24,672 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2022-07-13 15:57:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:57:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 15:57:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:24,675 INFO L225 Difference]: With dead ends: 55 [2022-07-13 15:57:24,675 INFO L226 Difference]: Without dead ends: 53 [2022-07-13 15:57:24,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:57:24,676 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:24,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-07-13 15:57:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-13 15:57:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-07-13 15:57:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 15:57:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-07-13 15:57:24,713 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 13 [2022-07-13 15:57:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:24,714 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-07-13 15:57:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:57:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-07-13 15:57:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 15:57:24,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:24,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:57:24,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 757152462, now seen corresponding path program 1 times [2022-07-13 15:57:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302801678] [2022-07-13 15:57:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:24,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:57:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443582609] [2022-07-13 15:57:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:24,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:24,744 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) [2022-07-13 15:57:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:57:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:57:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:57:24,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:57:24,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302801678] [2022-07-13 15:57:24,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:57:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443582609] [2022-07-13 15:57:24,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443582609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:24,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:24,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:57:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909512131] [2022-07-13 15:57:24,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:57:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:57:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:57:24,879 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:57:26,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:28,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:29,574 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2022-07-13 15:57:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:57:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-13 15:57:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:29,577 INFO L225 Difference]: With dead ends: 62 [2022-07-13 15:57:29,577 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 15:57:29,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:29,578 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:29,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 93 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-07-13 15:57:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 15:57:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-13 15:57:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-13 15:57:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2022-07-13 15:57:29,600 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 16 [2022-07-13 15:57:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:29,601 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2022-07-13 15:57:29,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:57:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2022-07-13 15:57:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 15:57:29,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:29,602 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:29,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:29,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1299424529, now seen corresponding path program 1 times [2022-07-13 15:57:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:29,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732439641] [2022-07-13 15:57:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:29,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:57:29,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931064506] [2022-07-13 15:57:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:29,837 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) [2022-07-13 15:57:29,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:57:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 15:57:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:57:30,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:57:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732439641] [2022-07-13 15:57:30,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:57:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931064506] [2022-07-13 15:57:30,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931064506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:30,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:30,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:57:30,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532163742] [2022-07-13 15:57:30,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:57:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:57:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:57:30,023 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:57:32,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:32,452 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2022-07-13 15:57:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:57:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-13 15:57:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:32,457 INFO L225 Difference]: With dead ends: 69 [2022-07-13 15:57:32,457 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 15:57:32,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:32,458 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:32,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 15:57:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 15:57:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-13 15:57:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 15:57:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-13 15:57:32,464 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 21 [2022-07-13 15:57:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:32,464 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-13 15:57:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:57:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-13 15:57:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:57:32,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:32,464 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:32,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:32,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:32,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:32,668 INFO L85 PathProgramCache]: Analyzing trace with hash 333648556, now seen corresponding path program 1 times [2022-07-13 15:57:32,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:32,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462766550] [2022-07-13 15:57:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:32,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:57:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167431638] [2022-07-13 15:57:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:32,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:32,682 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) [2022-07-13 15:57:32,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:57:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:57:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:57:32,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:57:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462766550] [2022-07-13 15:57:32,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:57:32,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167431638] [2022-07-13 15:57:32,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167431638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:32,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:32,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:57:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448771188] [2022-07-13 15:57:32,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:32,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:57:32,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:57:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:57:32,817 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:57:34,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 15:57:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:35,501 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2022-07-13 15:57:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:57:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-13 15:57:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:35,503 INFO L225 Difference]: With dead ends: 63 [2022-07-13 15:57:35,503 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 15:57:35,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:35,504 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:35,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 15:57:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 15:57:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-13 15:57:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 15:57:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-07-13 15:57:35,510 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 23 [2022-07-13 15:57:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:35,511 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-07-13 15:57:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:57:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-07-13 15:57:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 15:57:35,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:35,512 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:35,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:35,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:35,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1526553909, now seen corresponding path program 1 times [2022-07-13 15:57:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:35,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585275275] [2022-07-13 15:57:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:35,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:35,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:57:35,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411629881] [2022-07-13 15:57:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:35,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:35,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:35,752 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) [2022-07-13 15:57:35,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process