./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa --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 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:58:22,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:58:22,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:58:22,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:58:22,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:58:22,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:58:22,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:58:22,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:58:22,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:58:22,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:58:22,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:58:22,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:58:22,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:58:22,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:58:22,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:58:22,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:58:22,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:58:22,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:58:22,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:58:22,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:58:22,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:58:22,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:58:22,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:58:22,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:58:22,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:58:22,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:58:22,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:58:22,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:58:22,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:58:22,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:58:22,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:58:22,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:58:22,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:58:22,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:58:22,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:58:22,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:58:22,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:58:22,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:58:22,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:58:22,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:58:22,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:58:22,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:58:22,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:58:22,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:58:22,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:58:22,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:58:22,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:58:22,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:58:22,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:58:22,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:58:22,693 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:58:22,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:58:22,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:58:22,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:58:22,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:58:22,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:58:22,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:58:22,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:58:22,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:58:22,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:58:22,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:58:22,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:58:22,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:58:22,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:58:22,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:58:22,697 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 [2021-12-06 17:58:22,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:58:22,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:58:22,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:58:22,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:58:22,914 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:58:22,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2021-12-06 17:58:22,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/data/62c52dc52/6808f7177bde4e99ae3eb4674bcd856e/FLAG7c0023031 [2021-12-06 17:58:23,316 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:58:23,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2021-12-06 17:58:23,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/data/62c52dc52/6808f7177bde4e99ae3eb4674bcd856e/FLAG7c0023031 [2021-12-06 17:58:23,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/data/62c52dc52/6808f7177bde4e99ae3eb4674bcd856e [2021-12-06 17:58:23,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:58:23,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:58:23,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:58:23,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:58:23,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:58:23,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b38602f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23, skipping insertion in model container [2021-12-06 17:58:23,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:58:23,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:58:23,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2021-12-06 17:58:23,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2021-12-06 17:58:23,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:58:23,486 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:58:23,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2021-12-06 17:58:23,503 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2021-12-06 17:58:23,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:58:23,514 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:58:23,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23 WrapperNode [2021-12-06 17:58:23,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:58:23,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:58:23,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:58:23,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:58:23,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,549 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-06 17:58:23,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:58:23,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:58:23,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:58:23,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:58:23,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:58:23,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:58:23,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:58:23,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:58:23,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (1/1) ... [2021-12-06 17:58:23,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:58:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:23,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:58:23,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:58:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:58:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 17:58:23,650 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 17:58:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 17:58:23,651 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 17:58:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:58:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:58:23,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:58:23,703 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:58:23,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:58:23,819 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:58:23,826 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:58:23,826 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:58:23,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:58:23 BoogieIcfgContainer [2021-12-06 17:58:23,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:58:23,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:58:23,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:58:23,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:58:23,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:58:23" (1/3) ... [2021-12-06 17:58:23,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339cf50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:58:23, skipping insertion in model container [2021-12-06 17:58:23,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:58:23" (2/3) ... [2021-12-06 17:58:23,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339cf50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:58:23, skipping insertion in model container [2021-12-06 17:58:23,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:58:23" (3/3) ... [2021-12-06 17:58:23,837 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_8.i [2021-12-06 17:58:23,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:58:23,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 17:58:23,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:58:23,888 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 [2021-12-06 17:58:23,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 17:58:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:58:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:58:23,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:23,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:23,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-06 17:58:23,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:23,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571866960] [2021-12-06 17:58:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:23,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571866960] [2021-12-06 17:58:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571866960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:24,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:24,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:24,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645215189] [2021-12-06 17:58:24,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:24,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:24,121 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-12-06 17:58:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:24,162 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-06 17:58:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:24,164 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 [2021-12-06 17:58:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:24,170 INFO L225 Difference]: With dead ends: 90 [2021-12-06 17:58:24,170 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 17:58:24,172 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 [2021-12-06 17:58:24,175 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 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 [2021-12-06 17:58:24,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:58:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 17:58:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-06 17:58:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:58:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 17:58:24,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-06 17:58:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 17:58:24,207 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) [2021-12-06 17:58:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 17:58:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:58:24,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:24,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:58:24,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-06 17:58:24,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132122297] [2021-12-06 17:58:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132122297] [2021-12-06 17:58:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132122297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:24,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:58:24,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510520604] [2021-12-06 17:58:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:58:24,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:58:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:58:24,269 INFO L87 Difference]: Start difference. First operand 29 states and 32 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) [2021-12-06 17:58:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:24,323 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-06 17:58:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:58:24,324 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 [2021-12-06 17:58:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:24,324 INFO L225 Difference]: With dead ends: 36 [2021-12-06 17:58:24,325 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 17:58:24,325 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 [2021-12-06 17:58:24,327 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 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 [2021-12-06 17:58:24,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:58:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 17:58:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 17:58:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:58:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 17:58:24,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-06 17:58:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:24,335 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 17:58:24,335 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) [2021-12-06 17:58:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 17:58:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:58:24,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:24,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:24,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:58:24,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-06 17:58:24,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:24,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090223596] [2021-12-06 17:58:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:24,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:58:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025361413] [2021-12-06 17:58:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:24,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:24,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:58:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:58:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:53,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:59,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090223596] [2021-12-06 17:58:59,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:58:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025361413] [2021-12-06 17:58:59,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025361413] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:59,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:58:59,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 17:58:59,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998250238] [2021-12-06 17:58:59,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:58:59,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:58:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=208, Unknown=10, NotChecked=0, Total=272 [2021-12-06 17:58:59,998 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2021-12-06 17:59:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:03,244 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-06 17:59:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:59:03,245 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 [2021-12-06 17:59:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:03,246 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:59:03,246 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 17:59:03,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=74, Invalid=257, Unknown=11, NotChecked=0, Total=342 [2021-12-06 17:59:03,247 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:03,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 17:59:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 17:59:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-06 17:59:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:59:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 17:59:03,253 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-06 17:59:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:03,253 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 17:59:03,253 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) [2021-12-06 17:59:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 17:59:03,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:59:03,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:03,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:03,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:03,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-06 17:59:03,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:03,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892482761] [2021-12-06 17:59:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:03,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:03,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:03,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580964029] [2021-12-06 17:59:03,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:59:03,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:03,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:03,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:59:03,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:59:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:03,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:59:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:04,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:34,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892482761] [2021-12-06 17:59:34,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580964029] [2021-12-06 17:59:34,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580964029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:34,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:34,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 17:59:34,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823157913] [2021-12-06 17:59:34,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:34,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:59:34,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:34,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:59:34,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-12-06 17:59:34,879 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:35,054 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-06 17:59:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:59:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 17:59:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:35,055 INFO L225 Difference]: With dead ends: 43 [2021-12-06 17:59:35,055 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:59:35,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-12-06 17:59:35,057 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:35,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-06 17:59:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:59:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 17:59:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:59:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 17:59:35,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-06 17:59:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:35,062 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 17:59:35,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 17:59:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:59:35,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:35,063 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:35,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:59:35,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:35,264 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-06 17:59:35,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:35,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865630670] [2021-12-06 17:59:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:35,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:35,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003652895] [2021-12-06 17:59:35,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:59:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:35,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:35,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:59:35,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:59:35,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:35,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:59:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:54,313 WARN L227 SmtUtils]: Spent 7.85s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:00:17,332 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse3 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse3 256)) (= (mod (mod .cse4 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse4 127) (= .cse3 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse9 (+ .cse5 (- 256)))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (let ((.cse6 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod .cse9 .cse8))) (and (< 127 .cse5) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse6 256)) (not (= .cse7 0)) (not (= .cse8 0)) (= .cse6 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse8 255) .cse7) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse10 (- 256)))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (and (< 127 .cse10) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse12 0)) (not (= .cse11 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse11 255) .cse12) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 18:00:57,605 WARN L227 SmtUtils]: Spent 28.54s on a formula simplification. DAG size of input: 59 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:16,502 WARN L227 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:44,866 WARN L227 SmtUtils]: Spent 17.00s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 18:01:51,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:01,345 WARN L227 SmtUtils]: Spent 1.60m on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:10:45,457 WARN L227 SmtUtils]: Spent 4.62m on a formula simplification. DAG size of input: 93 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:11:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:11:42,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:11:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865630670] [2021-12-06 18:11:42,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:11:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003652895] [2021-12-06 18:11:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003652895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:11:42,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:11:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 18:11:42,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615009003] [2021-12-06 18:11:42,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:11:42,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:11:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:11:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:11:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=266, Unknown=33, NotChecked=36, Total=420 [2021-12-06 18:11:42,413 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-06 18:12:10,321 WARN L227 SmtUtils]: Spent 21.45s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:12:17,976 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse3 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (mod .cse28 256))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 .cse1)) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse2)) (or (and .cse3 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (and (not (= .cse4 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse5 .cse4) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse5 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse8) 256))) (let ((.cse7 (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse6 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (= (mod (mod .cse8 .cse6) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse8 127) (= .cse7 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse9 (- 256)))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse10 (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse11 (mod .cse13 .cse12))) (and (< 127 .cse9) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse10 256)) (not (= .cse11 0)) (not (= .cse12 0)) (= .cse10 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse12 255) .cse11) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse14 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse17 (+ .cse14 (- 256)))) (let ((.cse15 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse17) 256))) (let ((.cse16 (mod .cse17 .cse15))) (and (< 127 .cse14) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse15 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse16 0)) (not (= .cse15 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse15 255) .cse16) 256))))))))) .cse18)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (or .cse0 .cse2 (let ((.cse29 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256)) (.cse30 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse30) 256) 0))) (.cse20 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse21 (<= .cse30 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse22 (< 127 .cse30)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse24 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse25 (<= .cse29 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse26 (< 127 .cse29))) (and (or (and (or .cse19 .cse3 .cse20 .cse21 .cse22) (or .cse3 .cse23 .cse24 .cse25 .cse26)) (<= .cse1 127)) (or (let ((.cse27 (= .cse28 0))) (and (or .cse19 .cse3 .cse20 .cse21 .cse22 .cse27) (or (<= .cse1 |c_ULTIMATE.start_main1_~x~0#1|) .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0))) (or .cse3 .cse23 .cse24 .cse25 .cse27 .cse26))) (< 127 .cse1))))))))) is different from false [2021-12-06 18:12:20,030 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256)) (.cse16 (mod .cse32 256))) (let ((.cse1 (= 0 .cse16)) (.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (<= .cse16 127)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (< 127 .cse21)) (.cse15 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse19 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse17 (= .cse32 0)) (.cse20 (< 127 .cse16)) (.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (and (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|)) (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse1) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (or .cse0 (let ((.cse23 (+ (- 256) .cse21))) (let ((.cse22 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (let ((.cse9 (= .cse21 0)) (.cse10 (not (= (mod (mod .cse21 .cse24) 256) 0))) (.cse11 (<= .cse24 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse3 (not (= (mod (mod .cse23 .cse22) 256) 0))) (.cse5 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse21 127))) (and (or .cse2 (let ((.cse6 (let ((.cse13 (+ (- 256) .cse16))) (let ((.cse14 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256))) (or (not (= (mod (mod .cse13 .cse14) 256) 0)) .cse15 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (and (or .cse3 .cse4 .cse5) .cse6) .cse7 .cse8) (or .cse7 (and (or .cse4 .cse9 .cse10 .cse11) .cse6) .cse12)))) (or (let ((.cse18 (or (<= .cse19 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse19) 256) 0)) .cse15 .cse1))) (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse17) .cse18) .cse7 .cse12) (or .cse7 (and .cse18 (or .cse3 .cse4 .cse5 .cse17)) .cse8))) .cse20)))))) (or .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse31 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256))) (let ((.cse25 (not (= .cse24 0))) (.cse26 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse28 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse29 (<= .cse31 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse30 (< 127 .cse31))) (and (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12) (or .cse4 .cse27 .cse28 .cse29 .cse30)) .cse2) (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12 .cse17) (or (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|) .cse15 (not (= .cse19 0))) (or .cse4 .cse27 .cse28 .cse29 .cse17 .cse30)) .cse20))))))))) is different from false [2021-12-06 18:12:22,048 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256)) (.cse16 (mod .cse32 256))) (let ((.cse1 (= 0 .cse16)) (.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (<= .cse16 127)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (< 127 .cse21)) (.cse15 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse19 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse17 (= .cse32 0)) (.cse20 (< 127 .cse16)) (.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (and (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|)) (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse1) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (or .cse0 (let ((.cse23 (+ (- 256) .cse21))) (let ((.cse22 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (let ((.cse9 (= .cse21 0)) (.cse10 (not (= (mod (mod .cse21 .cse24) 256) 0))) (.cse11 (<= .cse24 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse3 (not (= (mod (mod .cse23 .cse22) 256) 0))) (.cse5 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse21 127))) (and (or .cse2 (let ((.cse6 (let ((.cse13 (+ (- 256) .cse16))) (let ((.cse14 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256))) (or (not (= (mod (mod .cse13 .cse14) 256) 0)) .cse15 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (and (or .cse3 .cse4 .cse5) .cse6) .cse7 .cse8) (or .cse7 (and (or .cse4 .cse9 .cse10 .cse11) .cse6) .cse12)))) (or (let ((.cse18 (or (<= .cse19 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse19) 256) 0)) .cse15 .cse1))) (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse17) .cse18) .cse7 .cse12) (or .cse7 (and .cse18 (or .cse3 .cse4 .cse5 .cse17)) .cse8))) .cse20)))))) (or .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse31 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256))) (let ((.cse25 (not (= .cse24 0))) (.cse26 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse28 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse29 (<= .cse31 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse30 (< 127 .cse31))) (and (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12) (or .cse4 .cse27 .cse28 .cse29 .cse30)) .cse2) (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12 .cse17) (or (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|) .cse15 (not (= .cse19 0))) (or .cse4 .cse27 .cse28 .cse29 .cse17 .cse30)) .cse20))))))))) is different from true [2021-12-06 18:12:25,156 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256)) (.cse16 (mod .cse32 256))) (let ((.cse1 (= 0 .cse16)) (.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (<= .cse16 127)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (< 127 .cse21)) (.cse15 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse19 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse17 (= .cse32 0)) (.cse20 (< 127 .cse16)) (.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse1) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (or .cse0 (let ((.cse23 (+ (- 256) .cse21))) (let ((.cse22 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (let ((.cse9 (= .cse21 0)) (.cse10 (not (= (mod (mod .cse21 .cse24) 256) 0))) (.cse11 (<= .cse24 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse3 (not (= (mod (mod .cse23 .cse22) 256) 0))) (.cse5 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse21 127))) (and (or .cse2 (let ((.cse6 (let ((.cse13 (+ (- 256) .cse16))) (let ((.cse14 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256))) (or (not (= (mod (mod .cse13 .cse14) 256) 0)) .cse15 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (and (or .cse3 .cse4 .cse5) .cse6) .cse7 .cse8) (or .cse7 (and (or .cse4 .cse9 .cse10 .cse11) .cse6) .cse12)))) (or (let ((.cse18 (or (<= .cse19 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse19) 256) 0)) .cse15 .cse1))) (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse17) .cse18) .cse7 .cse12) (or .cse7 (and .cse18 (or .cse3 .cse4 .cse5 .cse17)) .cse8))) .cse20)))))) (or .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse31 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256))) (let ((.cse25 (not (= .cse24 0))) (.cse26 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse28 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse29 (<= .cse31 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse30 (< 127 .cse31))) (and (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12) (or .cse4 .cse27 .cse28 .cse29 .cse30)) .cse2) (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12 .cse17) (or (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|) .cse15 (not (= .cse19 0))) (or .cse4 .cse27 .cse28 .cse29 .cse17 .cse30)) .cse20))))))))) is different from true [2021-12-06 18:12:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:25,163 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-06 18:12:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:12:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 14 [2021-12-06 18:12:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:25,164 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:12:25,164 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 18:12:25,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 604.2s TimeCoverageRelationStatistics Valid=113, Invalid=325, Unknown=40, NotChecked=172, Total=650 [2021-12-06 18:12:25,166 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:25,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 266 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-12-06 18:12:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 18:12:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-12-06 18:12:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:12:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-06 18:12:25,172 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 14 [2021-12-06 18:12:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:25,172 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-06 18:12:25,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-06 18:12:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-06 18:12:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:12:25,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:25,173 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:25,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:12:25,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:25,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash 829995612, now seen corresponding path program 1 times [2021-12-06 18:12:25,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:25,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258448871] [2021-12-06 18:12:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:25,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:25,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:12:25,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488684841] [2021-12-06 18:12:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:25,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:25,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:25,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a386f97-4361-4b69-96e8-e1451b74cfd6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:12:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:12:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates...