./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/gcd_3+newton_3_5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:57:02,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:57:02,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:57:02,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:57:02,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:57:02,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:57:02,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:57:02,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:57:02,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:57:02,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:57:02,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:57:02,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:57:02,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:57:02,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:57:02,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:57:02,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:57:02,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:57:02,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:57:02,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:57:02,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:57:02,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:57:02,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:57:02,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:57:02,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:57:02,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:57:02,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:57:02,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:57:02,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:57:02,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:57:02,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:57:02,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:57:02,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:57:02,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:57:02,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:57:02,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:57:02,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:57:02,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:57:02,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:57:02,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:57:02,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:57:02,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:57:02,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:57:02,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:57:02,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:57:02,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:57:02,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:57:02,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:57:02,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:57:02,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:57:02,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:57:02,491 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:57:02,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:57:02,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:57:02,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:57:02,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:57:02,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:57:02,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:57:02,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:57:02,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:57:02,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:57:02,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:57:02,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:57:02,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:57:02,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:57:02,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:57:02,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:57:02,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:57:02,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:57:02,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:57:02,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:57:02,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd [2021-12-14 15:57:02,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:57:02,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:57:02,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:57:02,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:57:02,707 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:57:02,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2021-12-14 15:57:02,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f71de7/5a5d1f723baa4eb6ac867a2616b70aac/FLAG9e3a855b4 [2021-12-14 15:57:03,109 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:57:03,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2021-12-14 15:57:03,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f71de7/5a5d1f723baa4eb6ac867a2616b70aac/FLAG9e3a855b4 [2021-12-14 15:57:03,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f71de7/5a5d1f723baa4eb6ac867a2616b70aac [2021-12-14 15:57:03,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:57:03,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:57:03,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:57:03,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:57:03,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:57:03,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7cc446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03, skipping insertion in model container [2021-12-14 15:57:03,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:57:03,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:57:03,683 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/combinations/gcd_3+newton_3_5.i[1226,1239] [2021-12-14 15:57:03,698 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/combinations/gcd_3+newton_3_5.i[2862,2875] [2021-12-14 15:57:03,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:57:03,703 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:57:03,711 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/combinations/gcd_3+newton_3_5.i[1226,1239] [2021-12-14 15:57:03,722 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/combinations/gcd_3+newton_3_5.i[2862,2875] [2021-12-14 15:57:03,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:57:03,731 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:57:03,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03 WrapperNode [2021-12-14 15:57:03,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:57:03,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:57:03,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:57:03,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:57:03,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,754 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-12-14 15:57:03,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:57:03,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:57:03,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:57:03,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:57:03,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:57:03,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:57:03,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:57:03,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:57:03,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (1/1) ... [2021-12-14 15:57:03,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:57:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:57:03,806 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) [2021-12-14 15:57:03,814 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 [2021-12-14 15:57:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:57:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-14 15:57:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-14 15:57:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-14 15:57:03,828 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-14 15:57:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:57:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:57:03,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:57:03,869 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:57:03,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:57:03,985 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:57:03,996 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:57:04,002 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 15:57:04,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:57:04 BoogieIcfgContainer [2021-12-14 15:57:04,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:57:04,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:57:04,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:57:04,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:57:04,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:57:03" (1/3) ... [2021-12-14 15:57:04,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410b0c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:57:04, skipping insertion in model container [2021-12-14 15:57:04,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:03" (2/3) ... [2021-12-14 15:57:04,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410b0c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:57:04, skipping insertion in model container [2021-12-14 15:57:04,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:57:04" (3/3) ... [2021-12-14 15:57:04,015 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_5.i [2021-12-14 15:57:04,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:57:04,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:57:04,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:57:04,069 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 [2021-12-14 15:57:04,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:57:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 15:57:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:57:04,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:04,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:04,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-14 15:57:04,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:04,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628547094] [2021-12-14 15:57:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:04,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:57:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:04,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:57:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628547094] [2021-12-14 15:57:04,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628547094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:57:04,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:57:04,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:57:04,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847464187] [2021-12-14 15:57:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:57:04,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:57:04,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:57:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:57:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:57:04,275 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-14 15:57:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:57:04,323 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2021-12-14 15:57:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:57:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 15:57:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:57:04,330 INFO L225 Difference]: With dead ends: 96 [2021-12-14 15:57:04,330 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 15:57:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:57:04,335 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:57:04,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:57:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 15:57:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-12-14 15:57:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 15:57:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-14 15:57:04,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2021-12-14 15:57:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:57:04,362 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-14 15:57:04,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-14 15:57:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-14 15:57:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:57:04,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:04,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:04,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:57:04,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-14 15:57:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504944293] [2021-12-14 15:57:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:04,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:57:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:04,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:57:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504944293] [2021-12-14 15:57:04,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504944293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:57:04,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:57:04,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:57:04,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013835421] [2021-12-14 15:57:04,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:57:04,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:57:04,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:57:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:57:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:57:04,421 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-12-14 15:57:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:57:04,480 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-14 15:57:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:57:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 15:57:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:57:04,482 INFO L225 Difference]: With dead ends: 39 [2021-12-14 15:57:04,482 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 15:57:04,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:57:04,483 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:57:04,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:57:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 15:57:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-14 15:57:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 15:57:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-14 15:57:04,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-14 15:57:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:57:04,489 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-14 15:57:04,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-12-14 15:57:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-14 15:57:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 15:57:04,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:04,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:04,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:57:04,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-14 15:57:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390380485] [2021-12-14 15:57:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:04,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:04,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:57:04,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66482613] [2021-12-14 15:57:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:04,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:57:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:57:04,505 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) [2021-12-14 15:57:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:57:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:57:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 15:57:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:57:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:33,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:57:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:40,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:57:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390380485] [2021-12-14 15:57:40,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:57:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66482613] [2021-12-14 15:57:40,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66482613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:57:40,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:57:40,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-14 15:57:40,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034615831] [2021-12-14 15:57:40,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:57:40,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 15:57:40,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:57:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 15:57:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=205, Unknown=13, NotChecked=0, Total=272 [2021-12-14 15:57:40,487 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-12-14 15:57:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:57:40,693 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-14 15:57:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:57:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 12 [2021-12-14 15:57:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:57:40,694 INFO L225 Difference]: With dead ends: 41 [2021-12-14 15:57:40,694 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 15:57:40,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=63, Invalid=230, Unknown=13, NotChecked=0, Total=306 [2021-12-14 15:57:40,695 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:57:40,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-14 15:57:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 15:57:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-14 15:57:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 15:57:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-14 15:57:40,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-12-14 15:57:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:57:40,703 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-14 15:57:40,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-12-14 15:57:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-14 15:57:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 15:57:40,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:40,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:40,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 15:57:40,911 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 [2021-12-14 15:57:40,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2021-12-14 15:57:40,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:40,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704726237] [2021-12-14 15:57:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:40,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:40,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:57:40,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497332797] [2021-12-14 15:57:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:40,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:57:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:57:40,920 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) [2021-12-14 15:57:40,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:57:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:57:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 15:57:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:58:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:58:06,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:58:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:58:24,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:58:24,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704726237] [2021-12-14 15:58:24,569 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:58:24,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497332797] [2021-12-14 15:58:24,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497332797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:58:24,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:58:24,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-14 15:58:24,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746324658] [2021-12-14 15:58:24,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:58:24,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 15:58:24,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:58:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 15:58:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=172, Unknown=15, NotChecked=0, Total=240 [2021-12-14 15:58:24,571 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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)