./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res1o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-fpi/res1o.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 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:14:03,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:14:03,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:14:03,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:14:03,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:14:03,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:14:03,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:14:03,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:14:03,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:14:03,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:14:03,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:14:03,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:14:03,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:14:03,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:14:03,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:14:03,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:14:03,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:14:03,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:14:03,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:14:03,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:14:03,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:14:03,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:14:03,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:14:03,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:14:03,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:14:03,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:14:03,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:14:03,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:14:03,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:14:03,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:14:03,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:14:03,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:14:03,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:14:03,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:14:03,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:14:03,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:14:03,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:14:03,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:14:03,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:14:03,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:14:03,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:14:03,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:14:03,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:14:03,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:14:03,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:14:03,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:14:03,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:14:03,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:14:03,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:14:03,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:14:03,593 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:14:03,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:14:03,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:14:03,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:14:03,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:14:03,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:14:03,596 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:14:03,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:14:03,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:14:03,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:14:03,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf [2021-12-21 10:14:03,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:14:03,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:14:03,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:14:03,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:14:03,920 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:14:03,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res1o.c [2021-12-21 10:14:03,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afeccbcf0/b5f8ae97c7954e50967faa299966cae1/FLAG47f4b8415 [2021-12-21 10:14:04,295 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:14:04,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res1o.c [2021-12-21 10:14:04,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afeccbcf0/b5f8ae97c7954e50967faa299966cae1/FLAG47f4b8415 [2021-12-21 10:14:04,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afeccbcf0/b5f8ae97c7954e50967faa299966cae1 [2021-12-21 10:14:04,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:14:04,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:14:04,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:14:04,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:14:04,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:14:04,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13df8ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04, skipping insertion in model container [2021-12-21 10:14:04,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:14:04,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:14:04,461 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-fpi/res1o.c[588,601] [2021-12-21 10:14:04,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:14:04,483 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:14:04,492 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-fpi/res1o.c[588,601] [2021-12-21 10:14:04,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:14:04,518 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:14:04,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04 WrapperNode [2021-12-21 10:14:04,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:14:04,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:14:04,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:14:04,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:14:04,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,551 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2021-12-21 10:14:04,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:14:04,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:14:04,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:14:04,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:14:04,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:14:04,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:14:04,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:14:04,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:14:04,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (1/1) ... [2021-12-21 10:14:04,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:14:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:14:04,604 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) [2021-12-21 10:14:04,623 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 [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:14:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:14:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:14:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:14:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:14:04,675 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:14:04,676 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:14:04,762 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:14:04,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:14:04,766 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 10:14:04,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:14:04 BoogieIcfgContainer [2021-12-21 10:14:04,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:14:04,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:14:04,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:14:04,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:14:04,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:14:04" (1/3) ... [2021-12-21 10:14:04,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894ccfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:14:04, skipping insertion in model container [2021-12-21 10:14:04,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:04" (2/3) ... [2021-12-21 10:14:04,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894ccfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:14:04, skipping insertion in model container [2021-12-21 10:14:04,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:14:04" (3/3) ... [2021-12-21 10:14:04,773 INFO L111 eAbstractionObserver]: Analyzing ICFG res1o.c [2021-12-21 10:14:04,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:14:04,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:14:04,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:14:04,806 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:14:04,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:14:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:14:04,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:04,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:04,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-12-21 10:14:04,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:04,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146245143] [2021-12-21 10:14:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:04,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:04,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146245143] [2021-12-21 10:14:04,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146245143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:14:04,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:14:04,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:14:04,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215541203] [2021-12-21 10:14:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:14:04,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:14:04,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:14:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:14:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:14:04,948 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-12-21 10:14:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:14:04,959 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-12-21 10:14:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:14:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:14:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:14:04,965 INFO L225 Difference]: With dead ends: 44 [2021-12-21 10:14:04,965 INFO L226 Difference]: Without dead ends: 20 [2021-12-21 10:14:04,967 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:14:04,972 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-12-21 10:14:04,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:14:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-21 10:14:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-21 10:14:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-21 10:14:04,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-12-21 10:14:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:14:04,998 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-21 10:14:04,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-12-21 10:14:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-21 10:14:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:14:04,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:04,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:04,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:14:05,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:05,003 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-12-21 10:14:05,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:05,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106131047] [2021-12-21 10:14:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:05,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:05,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:05,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106131047] [2021-12-21 10:14:05,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106131047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:14:05,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:14:05,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:14:05,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965510066] [2021-12-21 10:14:05,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:14:05,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:14:05,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:14:05,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:14:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:14:05,106 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-12-21 10:14:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:14:05,166 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-12-21 10:14:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:14:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:14:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:14:05,168 INFO L225 Difference]: With dead ends: 41 [2021-12-21 10:14:05,168 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 10:14:05,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:14:05,172 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:14:05,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:14:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 10:14:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-21 10:14:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-12-21 10:14:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-21 10:14:05,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-12-21 10:14:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:14:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-21 10:14:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-12-21 10:14:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-21 10:14:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 10:14:05,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:05,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:05,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:14:05,188 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-12-21 10:14:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:05,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558194653] [2021-12-21 10:14:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:05,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:05,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:05,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558194653] [2021-12-21 10:14:05,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558194653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:14:05,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523192219] [2021-12-21 10:14:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:05,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:14:05,600 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) [2021-12-21 10:14:05,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:14:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 10:14:05,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:14:05,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:14:05,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:14:05,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 10:14:05,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-12-21 10:14:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:06,056 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-21 10:14:06,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-21 10:14:06,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:06,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-12-21 10:14:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:06,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-12-21 10:14:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:14:09,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:09,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:09,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523192219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:14:09,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:14:09,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-12-21 10:14:09,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343327574] [2021-12-21 10:14:09,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:14:09,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 10:14:09,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:14:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 10:14:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-12-21 10:14:09,346 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:14:09,928 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-12-21 10:14:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 10:14:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 10:14:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:14:09,930 INFO L225 Difference]: With dead ends: 67 [2021-12-21 10:14:09,930 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 10:14:09,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=324, Invalid=1398, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 10:14:09,931 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:14:09,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 199 Unchecked, 0.1s Time] [2021-12-21 10:14:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 10:14:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-12-21 10:14:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-21 10:14:09,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 23 [2021-12-21 10:14:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:14:09,938 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-21 10:14:09,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-21 10:14:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:14:09,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:09,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:09,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:14:10,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:10,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-12-21 10:14:10,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:10,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142301355] [2021-12-21 10:14:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:10,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 10:14:10,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142301355] [2021-12-21 10:14:10,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142301355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:14:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720952610] [2021-12-21 10:14:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:14:10,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:14:10,271 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) [2021-12-21 10:14:10,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:14:10,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:14:10,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:14:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:14:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:14:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 10:14:10,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:14:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 10:14:10,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720952610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:14:10,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:14:10,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:14:10,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230911270] [2021-12-21 10:14:10,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:14:10,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:14:10,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:14:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:14:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:14:10,451 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:14:10,583 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2021-12-21 10:14:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:14:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 10:14:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:14:10,585 INFO L225 Difference]: With dead ends: 93 [2021-12-21 10:14:10,585 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 10:14:10,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:14:10,586 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:14:10,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:14:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 10:14:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-12-21 10:14:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-21 10:14:10,598 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-12-21 10:14:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:14:10,599 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-21 10:14:10,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-21 10:14:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:14:10,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:10,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:10,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:14:10,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 10:14:10,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2021-12-21 10:14:10,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:10,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826201196] [2021-12-21 10:14:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:10,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:14:10,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:10,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826201196] [2021-12-21 10:14:10,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826201196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:14:10,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792176321] [2021-12-21 10:14:10,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:14:10,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:14:10,868 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) [2021-12-21 10:14:10,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:14:10,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:14:10,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:14:10,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:14:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:14:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:14:10,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:14:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:14:11,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792176321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:14:11,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:14:11,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:14:11,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291841959] [2021-12-21 10:14:11,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:14:11,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:14:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:14:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:14:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:14:11,030 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:14:11,130 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-21 10:14:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:14:11,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:14:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:14:11,132 INFO L225 Difference]: With dead ends: 53 [2021-12-21 10:14:11,132 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 10:14:11,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:14:11,133 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:14:11,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:14:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 10:14:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-12-21 10:14:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-12-21 10:14:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-21 10:14:11,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2021-12-21 10:14:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:14:11,137 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-21 10:14:11,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:14:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-21 10:14:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 10:14:11,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:14:11,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:14:11,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:14:11,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:11,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:14:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:14:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-12-21 10:14:11,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:14:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636204457] [2021-12-21 10:14:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:14:11,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:14:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:14:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:14:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636204457] [2021-12-21 10:14:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636204457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:14:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276029147] [2021-12-21 10:14:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:14:12,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:14:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:14:12,139 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) [2021-12-21 10:14:12,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:14:12,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:14:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:14:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 10:14:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:14:12,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:14:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 10:14:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-21 10:14:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2021-12-21 10:14:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-12-21 10:14:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:12,931 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-21 10:14:12,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2021-12-21 10:14:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:13,217 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-12-21 10:14:13,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2021-12-21 10:14:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:14:13,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2021-12-21 10:14:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-12-21 10:14:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:14:13,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2021-12-21 10:14:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:14:13,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:00,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276029147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:00,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:00,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 56 [2021-12-21 10:15:00,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190913629] [2021-12-21 10:15:00,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:00,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-21 10:15:00,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-21 10:15:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2801, Unknown=13, NotChecked=0, Total=3080 [2021-12-21 10:15:00,295 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 56 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)