./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/modn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/modn.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 cdb2ab888d3671786efa22f9b95e3eee5cc353fa ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:14:21,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:14:21,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:14:21,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:14:21,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:14:21,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:14:21,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:14:21,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:14:21,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:14:21,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:14:21,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:14:21,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:14:21,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:14:21,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:14:21,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:14:21,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:14:21,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:14:21,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:14:21,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:14:21,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:14:21,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:14:21,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:14:21,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:14:21,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:14:21,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:14:21,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:14:21,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:14:21,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:14:21,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:14:21,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:14:21,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:14:21,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:14:21,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:14:21,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:14:21,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:14:21,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:14:21,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:14:21,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:14:21,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:14:21,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:14:21,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:14:21,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:14:21,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:14:21,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:14:21,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:14:21,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:14:21,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:14:21,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:14:21,499 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:14:21,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:14:21,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:14:21,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:14:21,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:14:21,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:14:21,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:14:21,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:14:21,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:14:21,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:14:21,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:14:21,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:14:21,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:14:21,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:14:21,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdb2ab888d3671786efa22f9b95e3eee5cc353fa [2021-08-25 19:14:21,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:14:21,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:14:21,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:14:21,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:14:21,806 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:14:21,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modn.c [2021-08-25 19:14:21,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09977a79/48263247aa914be29880e7995c5a302a/FLAG2467b389c [2021-08-25 19:14:22,271 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:14:22,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modn.c [2021-08-25 19:14:22,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09977a79/48263247aa914be29880e7995c5a302a/FLAG2467b389c [2021-08-25 19:14:22,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09977a79/48263247aa914be29880e7995c5a302a [2021-08-25 19:14:22,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:14:22,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:14:22,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:14:22,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:14:22,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:14:22,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa80d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22, skipping insertion in model container [2021-08-25 19:14:22,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:14:22,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:14:22,464 WARN L228 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/modn.c[587,600] [2021-08-25 19:14:22,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:14:22,494 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:14:22,518 WARN L228 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/modn.c[587,600] [2021-08-25 19:14:22,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:14:22,547 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:14:22,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22 WrapperNode [2021-08-25 19:14:22,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:14:22,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:14:22,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:14:22,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:14:22,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:14:22,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:14:22,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:14:22,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:14:22,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:14:22,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:14:22,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:14:22,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:14:22,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (1/1) ... [2021-08-25 19:14:22,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:14:22,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:14:22,626 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) [2021-08-25 19:14:22,648 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 [2021-08-25 19:14:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:14:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:14:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:14:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:14:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:14:22,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:14:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:14:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 19:14:22,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:14:22,996 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:14:22,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:14:22 BoogieIcfgContainer [2021-08-25 19:14:22,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:14:22,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:14:22,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:14:23,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:14:23,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:14:22" (1/3) ... [2021-08-25 19:14:23,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed6a318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:14:23, skipping insertion in model container [2021-08-25 19:14:23,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:14:22" (2/3) ... [2021-08-25 19:14:23,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed6a318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:14:23, skipping insertion in model container [2021-08-25 19:14:23,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:14:22" (3/3) ... [2021-08-25 19:14:23,004 INFO L111 eAbstractionObserver]: Analyzing ICFG modn.c [2021-08-25 19:14:23,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:14:23,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:14:23,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:14:23,085 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 19:14:23,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:14:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:14:23,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:23,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:23,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:14:23,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:23,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015934165] [2021-08-25 19:14:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:23,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:14:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:14:23,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:23,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015934165] [2021-08-25 19:14:23,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015934165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:14:23,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:14:23,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:14:23,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95981700] [2021-08-25 19:14:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:14:23,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:14:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:14:23,295 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:23,308 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:14:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:14:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:14:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:23,317 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:14:23,318 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:14:23,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:14:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:14:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:14:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:14:23,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:14:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:23,357 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:14:23,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:14:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:14:23,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:23,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:23,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:14:23,359 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:14:23,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:23,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274965315] [2021-08-25 19:14:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:23,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:14:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:14:23,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:23,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274965315] [2021-08-25 19:14:23,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274965315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:14:23,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:14:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 19:14:23,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348973342] [2021-08-25 19:14:23,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:14:23,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:14:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:14:23,463 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:23,508 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-08-25 19:14:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:14:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:14:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:23,509 INFO L225 Difference]: With dead ends: 37 [2021-08-25 19:14:23,509 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:14:23,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:14:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:14:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:14:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:14:23,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-08-25 19:14:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:23,515 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:14:23,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:14:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:14:23,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:23,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:23,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:14:23,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:14:23,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:23,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909985402] [2021-08-25 19:14:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:23,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:23,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:14:23,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416509239] [2021-08-25 19:14:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:23,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:14:23,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:14:23,536 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) [2021-08-25 19:14:23,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:14:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:14:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-25 19:14:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:14:23,693 INFO L388 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 [2021-08-25 19:14:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-25 19:14:24,008 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-08-25 19:14:24,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2021-08-25 19:14:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-25 19:14:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:14:24,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909985402] [2021-08-25 19:14:24,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:14:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416509239] [2021-08-25 19:14:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416509239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:14:24,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:14:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 19:14:24,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839119716] [2021-08-25 19:14:24,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 19:14:24,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 19:14:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:14:24,266 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:24,499 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-08-25 19:14:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:14:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:14:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:24,501 INFO L225 Difference]: With dead ends: 39 [2021-08-25 19:14:24,501 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:14:24,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:14:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:14:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-08-25 19:14:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-08-25 19:14:24,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-08-25 19:14:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-25 19:14:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-08-25 19:14:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:14:24,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:24,518 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:24,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-25 19:14:24,733 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 [2021-08-25 19:14:24,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:14:24,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:24,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867213816] [2021-08-25 19:14:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:24,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:24,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:14:24,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438159288] [2021-08-25 19:14:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:14:24,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:14:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:14:24,760 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) [2021-08-25 19:14:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:14:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:14:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:14:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:14:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:14:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:14:24,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:24,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867213816] [2021-08-25 19:14:24,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:14:24,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438159288] [2021-08-25 19:14:24,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438159288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:14:24,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:14:24,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:14:24,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84521935] [2021-08-25 19:14:24,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:14:24,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:14:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:14:24,974 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:25,066 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-08-25 19:14:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:14:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:14:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:25,067 INFO L225 Difference]: With dead ends: 61 [2021-08-25 19:14:25,067 INFO L226 Difference]: Without dead ends: 42 [2021-08-25 19:14:25,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:14:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-25 19:14:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-08-25 19:14:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-25 19:14:25,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-08-25 19:14:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-25 19:14:25,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-25 19:14:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:14:25,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:25,073 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:25,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-25 19:14:25,296 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 [2021-08-25 19:14:25,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:14:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:25,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384100477] [2021-08-25 19:14:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:25,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:25,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:14:25,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272738282] [2021-08-25 19:14:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:14:25,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:14:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:14:25,310 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) [2021-08-25 19:14:25,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:14:25,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 19:14:25,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:14:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:14:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:14:25,592 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-08-25 19:14:25,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2021-08-25 19:14:25,652 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-08-25 19:14:25,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-08-25 19:14:26,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-25 19:14:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 19:14:26,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384100477] [2021-08-25 19:14:26,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:14:26,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272738282] [2021-08-25 19:14:26,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272738282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:14:26,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:14:26,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 19:14:26,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905268673] [2021-08-25 19:14:26,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:14:26,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:14:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:14:26,164 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:26,396 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-08-25 19:14:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:14:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:14:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:26,398 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:14:26,398 INFO L226 Difference]: Without dead ends: 30 [2021-08-25 19:14:26,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:14:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-25 19:14:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-08-25 19:14:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-25 19:14:26,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-08-25 19:14:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:26,401 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-25 19:14:26,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-25 19:14:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:14:26,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:14:26,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:14:26,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:14:26,620 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 [2021-08-25 19:14:26,621 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:14:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:14:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:14:26,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:14:26,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561876764] [2021-08-25 19:14:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:14:26,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:14:26,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:14:26,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048247934] [2021-08-25 19:14:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:14:26,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:14:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:14:26,656 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) [2021-08-25 19:14:26,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:14:26,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:14:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:14:26,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-25 19:14:26,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:14:26,789 INFO L388 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 [2021-08-25 19:14:26,799 INFO L388 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 [2021-08-25 19:14:26,823 INFO L388 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 25 treesize of output 13 [2021-08-25 19:14:26,882 INFO L388 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 25 treesize of output 13 [2021-08-25 19:14:27,053 INFO L388 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 29 treesize of output 24 [2021-08-25 19:14:27,223 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-25 19:14:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 49 [2021-08-25 19:14:27,530 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-25 19:14:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-25 19:14:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:14:27,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:14:27,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561876764] [2021-08-25 19:14:27,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:14:27,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048247934] [2021-08-25 19:14:27,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048247934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:14:27,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:14:27,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-25 19:14:27,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941057889] [2021-08-25 19:14:27,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:14:27,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:14:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:14:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:14:27,563 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:14:31,983 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-08-25 19:14:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-25 19:14:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:14:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:14:31,984 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:14:31,984 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 19:14:31,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3740.6ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-25 19:14:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 19:14:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 19:14:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 19:14:31,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-08-25 19:14:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:14:31,985 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 19:14:31,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:14:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 19:14:31,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 19:14:31,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:14:32,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:14:32,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:14:32,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 19:14:32,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:14:32,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:14:32,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:14:32,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point L32-2(lines 32 35) no Hoare annotation was computed. [2021-08-25 19:14:32,342 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L853 garLoopResultBuilder]: At program point L32-3(lines 32 35) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0.offset 0) (< 0 ~N~0)) [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L32-4(lines 32 35) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L853 garLoopResultBuilder]: At program point L37-3(lines 37 40) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0.offset 0) (< 0 ~N~0)) [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L37-4(lines 37 40) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L860 garLoopResultBuilder]: At program point L46(lines 21 47) the Hoare annotation is: true [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-08-25 19:14:32,343 INFO L857 garLoopResultBuilder]: For program point L42-2(lines 42 45) no Hoare annotation was computed. [2021-08-25 19:14:32,344 INFO L853 garLoopResultBuilder]: At program point L42-3(lines 42 45) the Hoare annotation is: (let ((.cse0 (< 0 ~N~0))) (or (and (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) (<= ~N~0 1) .cse0) (and (= ULTIMATE.start_main_~a~0.offset 0) .cse0))) [2021-08-25 19:14:32,344 INFO L857 garLoopResultBuilder]: For program point L42-4(lines 42 45) no Hoare annotation was computed. [2021-08-25 19:14:32,347 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:14:32,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:14:32 BoogieIcfgContainer [2021-08-25 19:14:32,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:14:32,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:14:32,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:14:32,361 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:14:32,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:14:22" (3/4) ... [2021-08-25 19:14:32,369 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 19:14:32,378 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-25 19:14:32,378 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-08-25 19:14:32,378 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-25 19:14:32,378 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 19:14:32,379 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 19:14:32,404 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:14:32,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:14:32,405 INFO L168 Benchmark]: Toolchain (without parser) took 10106.24 ms. Allocated memory was 60.8 MB in the beginning and 151.0 MB in the end (delta: 90.2 MB). Free memory was 39.8 MB in the beginning and 64.9 MB in the end (delta: -25.2 MB). Peak memory consumption was 63.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,405 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.2 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:14:32,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.72 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 44.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.95 ms. Allocated memory is still 60.8 MB. Free memory was 44.2 MB in the beginning and 42.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:14:32,406 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 41.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,406 INFO L168 Benchmark]: RCFGBuilder took 393.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 41.3 MB in the beginning and 60.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,407 INFO L168 Benchmark]: TraceAbstraction took 9361.68 ms. Allocated memory was 79.7 MB in the beginning and 151.0 MB in the end (delta: 71.3 MB). Free memory was 59.9 MB in the beginning and 68.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,407 INFO L168 Benchmark]: Witness Printer took 43.12 ms. Allocated memory is still 151.0 MB. Free memory was 68.1 MB in the beginning and 64.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:14:32,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.2 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.72 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 44.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.95 ms. Allocated memory is still 60.8 MB. Free memory was 44.2 MB in the beginning and 42.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 41.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 393.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 41.3 MB in the beginning and 60.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9361.68 ms. Allocated memory was 79.7 MB in the beginning and 151.0 MB in the end (delta: 71.3 MB). Free memory was 59.9 MB in the beginning and 68.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.1 GB. * Witness Printer took 43.12 ms. Allocated memory is still 151.0 MB. Free memory was 68.1 MB in the beginning and 64.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9268.7ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 10.6ms, AutomataDifference: 5076.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 152.8ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 178 SDslu, 167 SDs, 0 SdLazy, 496 SolverSat, 93 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 1082.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4238.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 25 NumberOfFragments, 36 HoareAnnotationTreeSize, 4 FomulaSimplifications, 3537 FormulaSimplificationTreeSizeReduction, 70.7ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 76.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 46.4ms SsaConstructionTime, 134.1ms SatisfiabilityAnalysisTime, 2456.4ms InterpolantComputationTime, 96 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 12 QuantifiedInterpolants, 884 SizeOfPredicates, 36 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 8/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: a == 0 && 0 < N - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: a == 0 && 0 < N - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((i <= 1 && 1 <= i) && N <= 1) && 0 < N) || (a == 0 && 0 < N) RESULT: Ultimate proved your program to be correct! [2021-08-25 19:14:32,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...