./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c --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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/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 ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:48:55,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:48:55,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:48:55,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:48:55,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:48:55,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:48:55,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:48:55,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:48:55,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:48:55,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:48:55,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:48:55,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:48:55,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:48:55,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:48:55,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:48:55,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:48:55,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:48:55,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:48:55,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:48:55,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:48:55,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:48:55,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:48:55,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:48:55,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:48:55,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:48:55,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:48:55,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:48:55,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:48:55,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:48:55,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:48:55,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:48:55,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:48:55,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:48:55,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:48:55,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:48:55,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:48:55,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:48:55,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:48:55,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:48:55,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:48:55,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:48:55,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:48:55,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:48:55,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:48:55,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:48:55,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:48:55,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:48:55,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:48:55,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:48:55,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:48:55,756 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:48:55,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:48:55,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:48:55,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:48:55,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:48:55,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:48:55,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:48:55,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:48:55,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:48:55,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:48:55,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:48:55,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:48:55,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:48:55,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:48:55,759 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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 [2021-12-07 00:48:55,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:48:55,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:48:55,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:48:55,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:48:55,952 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:48:55,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-12-07 00:48:55,995 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/data/2d37fe207/f3617243e9944afb8fed83a8d00fd3e6/FLAGcf53f9a02 [2021-12-07 00:48:56,373 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:48:56,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-12-07 00:48:56,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/data/2d37fe207/f3617243e9944afb8fed83a8d00fd3e6/FLAGcf53f9a02 [2021-12-07 00:48:56,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/data/2d37fe207/f3617243e9944afb8fed83a8d00fd3e6 [2021-12-07 00:48:56,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:48:56,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:48:56,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:48:56,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:48:56,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:48:56,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1324a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56, skipping insertion in model container [2021-12-07 00:48:56,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:48:56,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:48:56,522 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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2021-12-07 00:48:56,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:48:56,549 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:48:56,559 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_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2021-12-07 00:48:56,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:48:56,580 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:48:56,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56 WrapperNode [2021-12-07 00:48:56,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:48:56,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:48:56,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:48:56,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:48:56,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,609 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-07 00:48:56,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:48:56,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:48:56,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:48:56,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:48:56,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:48:56,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:48:56,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:48:56,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:48:56,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (1/1) ... [2021-12-07 00:48:56,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:48:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:56,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:48:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:48:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:48:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:48:56,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:48:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:48:56,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:48:56,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:48:56,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:48:56,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:48:56,748 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:48:56,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:48:56,849 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:48:56,856 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:48:56,856 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:48:56,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56 BoogieIcfgContainer [2021-12-07 00:48:56,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:48:56,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:48:56,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:48:56,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:48:56,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:48:56" (1/3) ... [2021-12-07 00:48:56,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb694f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:56, skipping insertion in model container [2021-12-07 00:48:56,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:56" (2/3) ... [2021-12-07 00:48:56,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb694f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:56, skipping insertion in model container [2021-12-07 00:48:56,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56" (3/3) ... [2021-12-07 00:48:56,866 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2021-12-07 00:48:56,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:48:56,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:48:56,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:48:56,920 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 [2021-12-07 00:48:56,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:48:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-07 00:48:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:48:56,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:56,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:56,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-12-07 00:48:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020477537] [2021-12-07 00:48:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:56,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:48:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:48:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 00:48:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-07 00:48:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-07 00:48:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-07 00:48:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:48:57,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020477537] [2021-12-07 00:48:57,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020477537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:57,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:57,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:48:57,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425020818] [2021-12-07 00:48:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:57,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:48:57,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:48:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:48:57,159 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:48:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:57,179 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-12-07 00:48:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:48:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-07 00:48:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:57,186 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:48:57,187 INFO L226 Difference]: Without dead ends: 31 [2021-12-07 00:48:57,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:48:57,192 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:57,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-07 00:48:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-07 00:48:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:48:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-07 00:48:57,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-12-07 00:48:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:57,224 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-07 00:48:57,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:48:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-07 00:48:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:48:57,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:57,227 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:48:57,227 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-12-07 00:48:57,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:57,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072089111] [2021-12-07 00:48:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:57,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:57,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835891337] [2021-12-07 00:48:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:57,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:57,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:57,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:48:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:48:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:48:57,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:48:57,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072089111] [2021-12-07 00:48:57,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835891337] [2021-12-07 00:48:57,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835891337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:57,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:57,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-07 00:48:57,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981356953] [2021-12-07 00:48:57,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:57,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:48:57,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:48:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:48:57,545 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:48:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:57,614 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-12-07 00:48:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:48:57,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-07 00:48:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:57,616 INFO L225 Difference]: With dead ends: 48 [2021-12-07 00:48:57,616 INFO L226 Difference]: Without dead ends: 40 [2021-12-07 00:48:57,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:48:57,618 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:57,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-07 00:48:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-07 00:48:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:48:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-07 00:48:57,627 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-12-07 00:48:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:57,628 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-07 00:48:57,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:48:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-07 00:48:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:48:57,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:57,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:57,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:48:57,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-07 00:48:57,832 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-12-07 00:48:57,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:57,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265641499] [2021-12-07 00:48:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:57,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:57,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106331913] [2021-12-07 00:48:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:57,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:57,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:57,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:48:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:48:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:48:58,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:48:58,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:58,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265641499] [2021-12-07 00:48:58,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106331913] [2021-12-07 00:48:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106331913] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:58,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:48:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-07 00:48:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036960600] [2021-12-07 00:48:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:48:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:48:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:48:58,313 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 00:48:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:58,356 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-07 00:48:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:48:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-07 00:48:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:58,358 INFO L225 Difference]: With dead ends: 39 [2021-12-07 00:48:58,358 INFO L226 Difference]: Without dead ends: 37 [2021-12-07 00:48:58,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:48:58,360 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:58,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-07 00:48:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-07 00:48:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:48:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-07 00:48:58,369 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-12-07 00:48:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-07 00:48:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 00:48:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-07 00:48:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 00:48:58,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:58,372 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:58,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:48:58,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:58,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-12-07 00:48:58,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673829297] [2021-12-07 00:48:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:58,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:58,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:58,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40866184] [2021-12-07 00:48:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:58,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:58,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:58,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:48:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 00:48:58,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:48:58,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:48:58,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673829297] [2021-12-07 00:48:58,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40866184] [2021-12-07 00:48:58,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40866184] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:58,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:48:58,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2021-12-07 00:48:58,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363483802] [2021-12-07 00:48:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:58,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:48:58,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:48:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:48:58,981 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:48:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:59,013 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-07 00:48:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:48:59,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-12-07 00:48:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:59,015 INFO L225 Difference]: With dead ends: 50 [2021-12-07 00:48:59,015 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 00:48:59,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:48:59,016 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:59,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 00:48:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-07 00:48:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:48:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-07 00:48:59,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-12-07 00:48:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-07 00:48:59,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:48:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-07 00:48:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:48:59,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:59,031 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:59,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:48:59,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:59,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-12-07 00:48:59,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913928406] [2021-12-07 00:48:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:59,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:59,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:59,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260436656] [2021-12-07 00:48:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:59,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:59,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:59,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:48:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 00:48:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:48:59,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 00:48:59,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913928406] [2021-12-07 00:48:59,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260436656] [2021-12-07 00:48:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260436656] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:59,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:48:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2021-12-07 00:48:59,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356691152] [2021-12-07 00:48:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:48:59,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:48:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:48:59,703 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 00:48:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:59,748 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-12-07 00:48:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:48:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-12-07 00:48:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:59,750 INFO L225 Difference]: With dead ends: 54 [2021-12-07 00:48:59,750 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 00:48:59,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:48:59,751 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:59,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 146 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 00:48:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-07 00:48:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:48:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-07 00:48:59,759 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-12-07 00:48:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:59,759 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-07 00:48:59,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 00:48:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-07 00:48:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 00:48:59,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:59,761 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:59,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:48:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:59,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-12-07 00:48:59,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121538501] [2021-12-07 00:48:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:59,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:59,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:59,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43387154] [2021-12-07 00:48:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:59,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:00,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:00,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:49:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:49:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:49:00,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:00,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:00,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121538501] [2021-12-07 00:49:00,467 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:00,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43387154] [2021-12-07 00:49:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43387154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:00,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:49:00,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-07 00:49:00,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868290285] [2021-12-07 00:49:00,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:00,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:49:00,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:00,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:49:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:49:00,468 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 00:49:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:00,547 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-07 00:49:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:49:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-07 00:49:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:00,549 INFO L225 Difference]: With dead ends: 58 [2021-12-07 00:49:00,549 INFO L226 Difference]: Without dead ends: 56 [2021-12-07 00:49:00,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:49:00,550 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:00,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:49:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-07 00:49:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-07 00:49:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:49:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-07 00:49:00,561 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-12-07 00:49:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-07 00:49:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-07 00:49:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-07 00:49:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 00:49:00,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:00,563 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:00,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:49:00,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:49:00,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-12-07 00:49:00,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258653614] [2021-12-07 00:49:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:00,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:00,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699859175] [2021-12-07 00:49:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:00,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:00,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:00,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:00,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:49:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:49:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:49:00,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:49:01,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258653614] [2021-12-07 00:49:01,028 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699859175] [2021-12-07 00:49:01,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699859175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:01,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:01,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 00:49:01,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946373760] [2021-12-07 00:49:01,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:01,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:49:01,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:49:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:49:01,030 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-07 00:49:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:01,143 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-12-07 00:49:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:49:01,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-12-07 00:49:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:01,144 INFO L225 Difference]: With dead ends: 102 [2021-12-07 00:49:01,145 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 00:49:01,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:49:01,145 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:01,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 353 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:49:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 00:49:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-07 00:49:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-07 00:49:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-12-07 00:49:01,158 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-12-07 00:49:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:01,159 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-12-07 00:49:01,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-07 00:49:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-12-07 00:49:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:49:01,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:01,160 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:01,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:49:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:01,362 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-12-07 00:49:01,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680020213] [2021-12-07 00:49:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:01,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:01,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:01,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328509442] [2021-12-07 00:49:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:01,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:01,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:01,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:01,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:49:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:49:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 00:49:01,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 00:49:01,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680020213] [2021-12-07 00:49:01,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328509442] [2021-12-07 00:49:01,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328509442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:01,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:01,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-07 00:49:01,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594345794] [2021-12-07 00:49:01,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:01,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:49:01,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:49:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:49:01,756 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-07 00:49:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:01,973 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-12-07 00:49:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:49:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-12-07 00:49:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:01,976 INFO L225 Difference]: With dead ends: 128 [2021-12-07 00:49:01,976 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 00:49:01,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:49:01,977 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:01,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 300 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:49:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 00:49:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-12-07 00:49:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-07 00:49:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-12-07 00:49:01,992 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-12-07 00:49:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:01,993 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-12-07 00:49:01,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-07 00:49:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-12-07 00:49:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 00:49:01,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:01,994 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:02,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:49:02,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:02,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-12-07 00:49:02,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:02,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717897094] [2021-12-07 00:49:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:02,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:02,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:02,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427050428] [2021-12-07 00:49:02,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:49:02,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:02,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:02,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:49:02,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:49:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:49:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-07 00:49:02,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:49:03,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717897094] [2021-12-07 00:49:03,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427050428] [2021-12-07 00:49:03,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427050428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:03,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:03,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2021-12-07 00:49:03,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238913281] [2021-12-07 00:49:03,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:03,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:49:03,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:49:03,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:49:03,076 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-07 00:49:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:05,622 INFO L93 Difference]: Finished difference Result 234 states and 348 transitions. [2021-12-07 00:49:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:49:05,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 76 [2021-12-07 00:49:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:05,625 INFO L225 Difference]: With dead ends: 234 [2021-12-07 00:49:05,626 INFO L226 Difference]: Without dead ends: 232 [2021-12-07 00:49:05,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:49:05,627 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:05,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 394 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 00:49:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-07 00:49:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2021-12-07 00:49:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 112 states have internal predecessors, (134), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-07 00:49:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2021-12-07 00:49:05,660 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 76 [2021-12-07 00:49:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:05,660 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2021-12-07 00:49:05,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-07 00:49:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2021-12-07 00:49:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 00:49:05,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:05,662 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:05,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:49:05,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:49:05,863 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-12-07 00:49:05,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282082135] [2021-12-07 00:49:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:05,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:05,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:05,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6903501] [2021-12-07 00:49:05,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:49:05,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:05,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:05,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:05,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:49:05,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:49:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:05,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:49:05,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-07 00:49:06,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:06,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282082135] [2021-12-07 00:49:06,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6903501] [2021-12-07 00:49:06,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6903501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:06,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:49:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-07 00:49:06,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727665676] [2021-12-07 00:49:06,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:06,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:49:06,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:49:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:49:06,272 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 00:49:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:06,541 INFO L93 Difference]: Finished difference Result 213 states and 305 transitions. [2021-12-07 00:49:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:49:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-12-07 00:49:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:06,544 INFO L225 Difference]: With dead ends: 213 [2021-12-07 00:49:06,544 INFO L226 Difference]: Without dead ends: 211 [2021-12-07 00:49:06,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:49:06,545 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:06,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 252 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:49:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-07 00:49:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2021-12-07 00:49:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 118 states have internal predecessors, (140), 81 states have call successors, (81), 12 states have call predecessors, (81), 12 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-07 00:49:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 301 transitions. [2021-12-07 00:49:06,575 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 301 transitions. Word has length 81 [2021-12-07 00:49:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:06,575 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 301 transitions. [2021-12-07 00:49:06,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 00:49:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 301 transitions. [2021-12-07 00:49:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 00:49:06,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:06,576 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:06,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:49:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:06,777 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-12-07 00:49:06,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:06,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319847227] [2021-12-07 00:49:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:06,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:06,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113637953] [2021-12-07 00:49:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:06,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:06,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:06,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:49:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 00:49:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-07 00:49:07,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-07 00:49:07,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319847227] [2021-12-07 00:49:07,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113637953] [2021-12-07 00:49:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113637953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:07,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-07 00:49:07,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662180063] [2021-12-07 00:49:07,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:07,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:49:07,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:49:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:49:07,308 INFO L87 Difference]: Start difference. First operand 209 states and 301 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-07 00:49:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:09,945 INFO L93 Difference]: Finished difference Result 324 states and 478 transitions. [2021-12-07 00:49:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:49:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 87 [2021-12-07 00:49:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:09,948 INFO L225 Difference]: With dead ends: 324 [2021-12-07 00:49:09,948 INFO L226 Difference]: Without dead ends: 316 [2021-12-07 00:49:09,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:49:09,949 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 56 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:09,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 448 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 00:49:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-07 00:49:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2021-12-07 00:49:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 170 states have internal predecessors, (207), 127 states have call successors, (127), 15 states have call predecessors, (127), 15 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-07 00:49:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 460 transitions. [2021-12-07 00:49:09,997 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 460 transitions. Word has length 87 [2021-12-07 00:49:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 460 transitions. [2021-12-07 00:49:09,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-07 00:49:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 460 transitions. [2021-12-07 00:49:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-07 00:49:09,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:09,999 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:10,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:49:10,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:49:10,201 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-12-07 00:49:10,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:10,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805175248] [2021-12-07 00:49:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:10,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:10,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356702991] [2021-12-07 00:49:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:10,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:10,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:10,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:49:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:10,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:49:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-07 00:49:10,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-12-07 00:49:10,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805175248] [2021-12-07 00:49:10,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356702991] [2021-12-07 00:49:10,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356702991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:10,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:10,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-12-07 00:49:10,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588736567] [2021-12-07 00:49:10,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:10,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:49:10,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:49:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:49:10,551 INFO L87 Difference]: Start difference. First operand 312 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-07 00:49:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:10,789 INFO L93 Difference]: Finished difference Result 405 states and 592 transitions. [2021-12-07 00:49:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:49:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 103 [2021-12-07 00:49:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:10,791 INFO L225 Difference]: With dead ends: 405 [2021-12-07 00:49:10,791 INFO L226 Difference]: Without dead ends: 284 [2021-12-07 00:49:10,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:49:10,793 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 48 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:10,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 363 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:49:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-07 00:49:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-12-07 00:49:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 155 states have internal predecessors, (187), 115 states have call successors, (115), 13 states have call predecessors, (115), 13 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-07 00:49:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 416 transitions. [2021-12-07 00:49:10,837 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 416 transitions. Word has length 103 [2021-12-07 00:49:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:10,837 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 416 transitions. [2021-12-07 00:49:10,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-07 00:49:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 416 transitions. [2021-12-07 00:49:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-07 00:49:10,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:10,839 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:10,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-07 00:49:11,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:49:11,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-12-07 00:49:11,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:11,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894172137] [2021-12-07 00:49:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:11,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:11,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816063637] [2021-12-07 00:49:11,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:49:11,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:11,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:11,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:49:11,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:49:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:49:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:49:11,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:49:11,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894172137] [2021-12-07 00:49:11,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816063637] [2021-12-07 00:49:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816063637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:49:11,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:49:11,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:49:11,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275674485] [2021-12-07 00:49:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:49:11,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:49:11,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:49:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:49:11,169 INFO L87 Difference]: Start difference. First operand 283 states and 416 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:49:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:11,230 INFO L93 Difference]: Finished difference Result 363 states and 529 transitions. [2021-12-07 00:49:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:49:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-12-07 00:49:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:11,231 INFO L225 Difference]: With dead ends: 363 [2021-12-07 00:49:11,231 INFO L226 Difference]: Without dead ends: 190 [2021-12-07 00:49:11,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:49:11,233 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:11,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:49:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-07 00:49:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 166. [2021-12-07 00:49:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 90 states have internal predecessors, (101), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2021-12-07 00:49:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2021-12-07 00:49:11,260 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 106 [2021-12-07 00:49:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:11,261 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2021-12-07 00:49:11,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:49:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2021-12-07 00:49:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-07 00:49:11,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:11,262 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:11,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:49:11,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:11,464 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1723073834, now seen corresponding path program 2 times [2021-12-07 00:49:11,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669697905] [2021-12-07 00:49:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:11,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:11,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:11,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354324740] [2021-12-07 00:49:11,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:49:11,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:11,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:11,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:49:11,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:49:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:49:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 205 proven. 18 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-07 00:49:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-12-07 00:49:11,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:11,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669697905] [2021-12-07 00:49:11,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:11,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354324740] [2021-12-07 00:49:11,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354324740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:11,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:11,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-07 00:49:11,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526413427] [2021-12-07 00:49:11,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:11,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:49:11,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:49:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:49:11,875 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-12-07 00:49:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:12,104 INFO L93 Difference]: Finished difference Result 235 states and 320 transitions. [2021-12-07 00:49:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:49:12,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 128 [2021-12-07 00:49:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:12,106 INFO L225 Difference]: With dead ends: 235 [2021-12-07 00:49:12,106 INFO L226 Difference]: Without dead ends: 167 [2021-12-07 00:49:12,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:49:12,107 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 30 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:12,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 358 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:49:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-07 00:49:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-12-07 00:49:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 87 states have internal predecessors, (95), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2021-12-07 00:49:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2021-12-07 00:49:12,133 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 128 [2021-12-07 00:49:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2021-12-07 00:49:12,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-12-07 00:49:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2021-12-07 00:49:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-07 00:49:12,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:12,135 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:12,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:49:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:12,336 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-12-07 00:49:12,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541674350] [2021-12-07 00:49:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:12,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:12,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:12,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508327448] [2021-12-07 00:49:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:49:12,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:12,370 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:12,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:49:12,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:49:12,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 00:49:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 111 proven. 63 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-07 00:49:13,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:12,676 WARN L227 SmtUtils]: Spent 22.03s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:31,208 WARN L860 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 0) (let ((.cse0 (not (= |c___VERIFIER_assert_#in~cond| 1)))) (and (or .cse0 (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70| Int)) (let ((.cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70|))) (.cse1 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|))) (.cse3 (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|)))) (or (= .cse1 .cse2) (<= .cse3 0) (not (= .cse2 (let ((.cse4 (div .cse1 .cse3))) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| .cse4 |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| .cse4 |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|))))))))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70| Int)) (let ((.cse5 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|))) (.cse6 (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|)))) (or (= (mod .cse5 .cse6) 0) (= .cse5 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70|))) (<= .cse6 0)))) .cse0)))) is different from true [2021-12-07 00:56:11,825 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= |c___VERIFIER_assert_#in~cond| 1)))) (and (or .cse0 (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70| Int)) (let ((.cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70|))) (.cse1 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|))) (.cse3 (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|)))) (or (= .cse1 .cse2) (<= .cse3 0) (not (= .cse2 (let ((.cse4 (div .cse1 .cse3))) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| .cse4 |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| .cse4 |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|))))))))) (or (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70| Int)) (let ((.cse5 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|))) (.cse6 (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_87|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_78|)))) (or (= (mod .cse5 .cse6) 0) (= .cse5 (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_123| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_58|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_70|))) (<= .cse6 0)))) .cse0))) is different from true [2021-12-07 00:56:21,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541674350] [2021-12-07 00:56:21,849 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508327448] [2021-12-07 00:56:21,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508327448] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:21,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:56:21,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 00:56:21,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507752356] [2021-12-07 00:56:21,849 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:21,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:56:21,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:56:21,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=880, Unknown=21, NotChecked=126, Total=1190 [2021-12-07 00:56:21,850 INFO L87 Difference]: Start difference. First operand 163 states and 220 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-07 00:56:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:27,948 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2021-12-07 00:56:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:56:27,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 134 [2021-12-07 00:56:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:27,950 INFO L225 Difference]: With dead ends: 211 [2021-12-07 00:56:27,951 INFO L226 Difference]: Without dead ends: 204 [2021-12-07 00:56:27,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 82.1s TimeCoverageRelationStatistics Valid=269, Invalid=1438, Unknown=23, NotChecked=162, Total=1892 [2021-12-07 00:56:27,952 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 64 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:27,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 440 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 00:56:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-07 00:56:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 184. [2021-12-07 00:56:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 100 states have internal predecessors, (108), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-07 00:56:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2021-12-07 00:56:27,981 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 134 [2021-12-07 00:56:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2021-12-07 00:56:27,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-07 00:56:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2021-12-07 00:56:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 00:56:27,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:27,982 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:28,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:28,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:28,183 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash 821448208, now seen corresponding path program 3 times [2021-12-07 00:56:28,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:28,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092826332] [2021-12-07 00:56:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:28,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:28,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:56:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423670113] [2021-12-07 00:56:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:28,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:28,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:28,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:56:28,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:56:28,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:56:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 109 proven. 38 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2021-12-07 00:56:29,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:29,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092826332] [2021-12-07 00:56:29,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423670113] [2021-12-07 00:56:29,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423670113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:29,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:56:29,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-07 00:56:29,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275455006] [2021-12-07 00:56:29,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:56:29,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:56:29,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:56:29,817 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-07 00:56:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:30,463 INFO L93 Difference]: Finished difference Result 217 states and 292 transitions. [2021-12-07 00:56:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:56:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 147 [2021-12-07 00:56:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:30,465 INFO L225 Difference]: With dead ends: 217 [2021-12-07 00:56:30,465 INFO L226 Difference]: Without dead ends: 215 [2021-12-07 00:56:30,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:56:30,466 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:30,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 274 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:56:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-07 00:56:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-12-07 00:56:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 115 states have internal predecessors, (125), 82 states have call successors, (82), 17 states have call predecessors, (82), 17 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-07 00:56:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 288 transitions. [2021-12-07 00:56:30,505 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 288 transitions. Word has length 147 [2021-12-07 00:56:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 288 transitions. [2021-12-07 00:56:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-07 00:56:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 288 transitions. [2021-12-07 00:56:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-07 00:56:30,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:30,508 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:30,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:56:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:56:30,708 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2021-12-07 00:56:30,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109092196] [2021-12-07 00:56:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:30,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:30,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:56:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383652620] [2021-12-07 00:56:30,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:56:30,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:30,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:56:30,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:56:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:56:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 255 proven. 47 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-12-07 00:56:30,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 63 proven. 53 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-07 00:56:31,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109092196] [2021-12-07 00:56:31,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383652620] [2021-12-07 00:56:31,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383652620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:31,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:31,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-07 00:56:31,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988752220] [2021-12-07 00:56:31,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:31,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:56:31,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:56:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:56:31,325 INFO L87 Difference]: Start difference. First operand 213 states and 288 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 12 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 13 states have call predecessors, (49), 12 states have call successors, (49) [2021-12-07 00:56:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:31,887 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2021-12-07 00:56:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:56:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 12 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 13 states have call predecessors, (49), 12 states have call successors, (49) Word has length 150 [2021-12-07 00:56:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:31,889 INFO L225 Difference]: With dead ends: 349 [2021-12-07 00:56:31,889 INFO L226 Difference]: Without dead ends: 276 [2021-12-07 00:56:31,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:56:31,890 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 67 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:31,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 581 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 295 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-12-07 00:56:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-07 00:56:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 271. [2021-12-07 00:56:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 131 states have (on average 1.16793893129771) internal successors, (153), 132 states have internal predecessors, (153), 123 states have call successors, (123), 16 states have call predecessors, (123), 16 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2021-12-07 00:56:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 398 transitions. [2021-12-07 00:56:31,942 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 398 transitions. Word has length 150 [2021-12-07 00:56:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:31,943 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 398 transitions. [2021-12-07 00:56:31,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 17 states have internal predecessors, (51), 12 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 13 states have call predecessors, (49), 12 states have call successors, (49) [2021-12-07 00:56:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 398 transitions. [2021-12-07 00:56:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-07 00:56:31,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:31,944 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:31,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:56:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:56:32,146 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2021-12-07 00:56:32,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379428102] [2021-12-07 00:56:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:32,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:32,175 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:56:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216328598] [2021-12-07 00:56:32,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:32,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:32,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:32,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:56:32,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:56:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:56:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 145 proven. 44 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-12-07 00:56:32,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:48,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379428102] [2021-12-07 00:56:48,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216328598] [2021-12-07 00:56:48,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216328598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:48,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:56:48,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-07 00:56:48,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910505971] [2021-12-07 00:56:48,493 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:48,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:56:48,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:56:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=456, Unknown=4, NotChecked=0, Total=552 [2021-12-07 00:56:48,493 INFO L87 Difference]: Start difference. First operand 271 states and 398 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 00:56:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:50,861 INFO L93 Difference]: Finished difference Result 288 states and 412 transitions. [2021-12-07 00:56:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:56:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) Word has length 153 [2021-12-07 00:56:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:50,864 INFO L225 Difference]: With dead ends: 288 [2021-12-07 00:56:50,865 INFO L226 Difference]: Without dead ends: 281 [2021-12-07 00:56:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=149, Invalid=717, Unknown=4, NotChecked=0, Total=870 [2021-12-07 00:56:50,866 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:50,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 271 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 00:56:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-07 00:56:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 270. [2021-12-07 00:56:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 133 states have internal predecessors, (152), 119 states have call successors, (119), 18 states have call predecessors, (119), 18 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-12-07 00:56:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 389 transitions. [2021-12-07 00:56:50,922 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 389 transitions. Word has length 153 [2021-12-07 00:56:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:50,922 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 389 transitions. [2021-12-07 00:56:50,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 00:56:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 389 transitions. [2021-12-07 00:56:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-07 00:56:50,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:50,923 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:50,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:51,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:56:51,125 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2021-12-07 00:56:51,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719098047] [2021-12-07 00:56:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:51,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:51,155 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:56:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156699429] [2021-12-07 00:56:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:56:51,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:51,158 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:51,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:56:51,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:56:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:56:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 54 proven. 68 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-07 00:56:52,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 48 proven. 74 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-07 00:56:53,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719098047] [2021-12-07 00:56:53,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156699429] [2021-12-07 00:56:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156699429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:53,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:53,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-12-07 00:56:53,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924318919] [2021-12-07 00:56:53,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:56:53,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:56:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:56:53,088 INFO L87 Difference]: Start difference. First operand 270 states and 389 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2021-12-07 00:56:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:54,805 INFO L93 Difference]: Finished difference Result 288 states and 404 transitions. [2021-12-07 00:56:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:56:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 156 [2021-12-07 00:56:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:54,806 INFO L225 Difference]: With dead ends: 288 [2021-12-07 00:56:54,807 INFO L226 Difference]: Without dead ends: 113 [2021-12-07 00:56:54,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:56:54,808 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 35 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:54,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 401 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:56:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-07 00:56:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-07 00:56:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 35 states have call successors, (35), 13 states have call predecessors, (35), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-07 00:56:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-12-07 00:56:54,828 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 156 [2021-12-07 00:56:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-12-07 00:56:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2021-12-07 00:56:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-12-07 00:56:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-07 00:56:54,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:54,830 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:54,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:56:55,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:55,031 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1119272264, now seen corresponding path program 5 times [2021-12-07 00:56:55,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:55,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437542832] [2021-12-07 00:56:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:55,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:55,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:56:55,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977212167] [2021-12-07 00:56:55,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:56:55,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:55,064 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:55,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:56:55,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 00:56:55,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:56:55,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 876 proven. 51 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-12-07 00:56:56,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 141 proven. 45 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2021-12-07 00:56:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437542832] [2021-12-07 00:56:57,615 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:56:57,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977212167] [2021-12-07 00:56:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977212167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:57,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-12-07 00:56:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41592792] [2021-12-07 00:56:57,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:56:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:56:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:56:57,618 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 14 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (52), 13 states have call predecessors, (52), 14 states have call successors, (52) [2021-12-07 00:56:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:58,980 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2021-12-07 00:56:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:56:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 14 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (52), 13 states have call predecessors, (52), 14 states have call successors, (52) Word has length 200 [2021-12-07 00:56:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:58,981 INFO L225 Difference]: With dead ends: 122 [2021-12-07 00:56:58,981 INFO L226 Difference]: Without dead ends: 0 [2021-12-07 00:56:58,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:56:58,982 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 27 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:58,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 390 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:56:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-07 00:56:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-07 00:56:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-07 00:56:58,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 200 [2021-12-07 00:56:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:58,983 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-07 00:56:58,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 14 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (52), 13 states have call predecessors, (52), 14 states have call successors, (52) [2021-12-07 00:56:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-07 00:56:58,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-07 00:56:58,986 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 00:56:59,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:56:59,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:59,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-07 00:57:28,515 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse19 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse5 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse7 (= (+ .cse19 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (.cse12 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse13 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse14 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse19))) (.cse15 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse16 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse9 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse17 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse10 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse11 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse18 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (let ((.cse1 (+ .cse9 |ULTIMATE.start_main_~c~0#1|))) (and (= |ULTIMATE.start_main_~p~0#1| 0) .cse0 (= .cse1 |ULTIMATE.start_main_~a~0#1|) .cse2 (<= .cse1 2) .cse3 (= |ULTIMATE.start_main_~s~0#1| 0) .cse4 .cse5 .cse6 .cse7 .cse8)) (and .cse0 (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse2 (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse3 .cse4 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse5 .cse6 .cse7 .cse10 .cse8 .cse11) (and .cse12 .cse13 .cse2 .cse14 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse15 .cse16 (= |ULTIMATE.start_main_~k~0#1| 0) .cse4 .cse17 .cse10 .cse8 .cse11 .cse18) (and .cse12 .cse13 .cse2 (or (<= .cse9 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse14 .cse15 .cse16 (or (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| .cse9)) .cse4 (or (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) .cse17 .cse10 .cse8 .cse11 .cse18)))) [2021-12-07 00:57:28,516 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse17 (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|)) (.cse19 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse9 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse19))) (.cse12 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse13 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse14 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse7 (= .cse17 |ULTIMATE.start_main_~a~0#1|)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse15 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse0 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse4 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse5 (= (+ .cse19 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (.cse16 (* 2 |ULTIMATE.start_main_~b~0#1|))) (or (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse1 .cse2 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse9 .cse10 .cse0 .cse11 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse12 .cse13 (= |ULTIMATE.start_main_~k~0#1| 0) .cse2 .cse14 .cse6 .cse7 .cse8 .cse15) (and .cse9 .cse10 .cse0 (or (<= .cse16 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse11 .cse12 .cse13 (or (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| .cse16)) .cse2 (or (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) .cse14 .cse6 .cse7 .cse8 .cse15) (let ((.cse18 (+ .cse16 |ULTIMATE.start_main_~c~0#1|))) (and (= |ULTIMATE.start_main_~p~0#1| 0) (= .cse17 |ULTIMATE.start_main_~y~0#1|) (= .cse18 |ULTIMATE.start_main_~a~0#1|) .cse0 (<= .cse18 2) .cse1 (= |ULTIMATE.start_main_~s~0#1| 0) .cse2 .cse3 (= .cse18 |ULTIMATE.start_main_~y~0#1|) .cse4 .cse5))))) [2021-12-07 00:57:28,516 INFO L861 garLoopResultBuilder]: At program point L73(lines 18 74) the Hoare annotation is: true [2021-12-07 00:57:28,516 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-07 00:57:28,516 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-07 00:57:28,516 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-07 00:57:28,516 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-07 00:57:28,516 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-07 00:57:28,517 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse17 (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|)) (.cse19 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse9 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse19))) (.cse12 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse13 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse14 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse7 (= .cse17 |ULTIMATE.start_main_~a~0#1|)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse15 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse0 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse4 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse5 (= (+ .cse19 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (.cse16 (* 2 |ULTIMATE.start_main_~b~0#1|))) (or (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse1 .cse2 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse9 .cse10 .cse0 .cse11 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse12 .cse13 (= |ULTIMATE.start_main_~k~0#1| 0) .cse2 .cse14 .cse6 .cse7 .cse8 .cse15) (and .cse9 .cse10 .cse0 (or (<= .cse16 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse11 .cse12 .cse13 (or (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| .cse16)) .cse2 (or (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) .cse14 .cse6 .cse7 .cse8 .cse15) (let ((.cse18 (+ .cse16 |ULTIMATE.start_main_~c~0#1|))) (and (= |ULTIMATE.start_main_~p~0#1| 0) (= .cse17 |ULTIMATE.start_main_~y~0#1|) (= .cse18 |ULTIMATE.start_main_~a~0#1|) .cse0 (<= .cse18 2) .cse1 (= |ULTIMATE.start_main_~s~0#1| 0) .cse2 .cse3 (= .cse18 |ULTIMATE.start_main_~y~0#1|) .cse4 .cse5))))) [2021-12-07 00:57:28,517 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse0 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse1 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse6 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse3)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse4 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< |ULTIMATE.start_main_~c~0#1| .cse0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) .cse1 (= |ULTIMATE.start_main_~q~0#1| 1) .cse2 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~r~0#1| 1) (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) (= (+ .cse3 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|) .cse4 .cse5) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse6) (< .cse0 2) (<= 0 |ULTIMATE.start_main_~c~0#1|) .cse2 (< (* 2 |ULTIMATE.start_main_~c~0#1|) 2) .cse4 .cse5) (and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse1 (= |ULTIMATE.start_main_~b~0#1| .cse6) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) 2) .cse4 .cse5 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-12-07 00:57:28,517 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse1 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (and (or (= .cse0 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse1) (= |ULTIMATE.start_main_~b~0#1| .cse1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2) (= |ULTIMATE.start_main_~a~0#1| .cse0))) [2021-12-07 00:57:28,517 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-07 00:57:28,517 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-07 00:57:28,517 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse19 (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|)) (.cse21 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse21))) (.cse4 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse10 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse11 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse9 (= .cse19 |ULTIMATE.start_main_~a~0#1|)) (.cse13 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse14 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse15 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse16 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse17 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse18 (= (+ .cse21 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (.cse12 (* 2 |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse4 .cse5 (= |ULTIMATE.start_main_~k~0#1| 0) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 .cse2 (or (<= .cse12 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse3 .cse4 .cse5 (or (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| .cse12)) .cse6 (or (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse13 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse2 .cse14 .cse15 .cse6 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse16 .cse17 .cse18 .cse9) (let ((.cse20 (+ .cse12 |ULTIMATE.start_main_~c~0#1|))) (and .cse13 (= .cse19 |ULTIMATE.start_main_~y~0#1|) (= .cse20 |ULTIMATE.start_main_~a~0#1|) .cse2 (<= .cse20 2) .cse14 .cse15 .cse6 .cse16 (= .cse20 |ULTIMATE.start_main_~y~0#1|) .cse17 .cse18))))) [2021-12-07 00:57:28,517 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-12-07 00:57:28,518 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (or (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) [2021-12-07 00:57:28,518 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) 2) (<= |ULTIMATE.start_main_~x~0#1| 2) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-07 00:57:28,518 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) 2) (<= |ULTIMATE.start_main_~x~0#1| 2) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-07 00:57:28,518 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-07 00:57:28,518 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-07 00:57:28,519 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-07 00:57:28,519 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-12-07 00:57:28,519 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse19 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse5 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse7 (= (+ .cse19 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (.cse12 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse13 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse14 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) .cse19))) (.cse15 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse16 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse9 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse17 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse10 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse11 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse18 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (let ((.cse1 (+ .cse9 |ULTIMATE.start_main_~c~0#1|))) (and (= |ULTIMATE.start_main_~p~0#1| 0) .cse0 (= .cse1 |ULTIMATE.start_main_~a~0#1|) .cse2 (<= .cse1 2) .cse3 (= |ULTIMATE.start_main_~s~0#1| 0) .cse4 .cse5 .cse6 .cse7 .cse8)) (and .cse0 (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse2 (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse3 .cse4 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse5 .cse6 .cse7 .cse10 .cse8 .cse11) (and .cse12 .cse13 .cse2 .cse14 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse15 .cse16 (= |ULTIMATE.start_main_~k~0#1| 0) .cse4 .cse17 .cse10 .cse8 .cse11 .cse18) (and .cse12 .cse13 .cse2 (or (<= .cse9 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse14 .cse15 .cse16 (or (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| .cse9)) .cse4 (or (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) .cse17 .cse10 .cse8 .cse11 .cse18)))) [2021-12-07 00:57:28,519 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-12-07 00:57:28,519 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-12-07 00:57:28,520 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-07 00:57:28,520 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-07 00:57:28,520 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-07 00:57:28,520 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-07 00:57:28,520 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-07 00:57:28,520 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-07 00:57:28,520 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-07 00:57:28,521 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-07 00:57:28,521 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-07 00:57:28,521 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-07 00:57:28,525 INFO L732 BasicCegarLoop]: Path program histogram: [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:28,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:57:28,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:57:28 BoogieIcfgContainer [2021-12-07 00:57:28,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:57:28,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:57:28,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:57:28,553 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:57:28,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56" (3/4) ... [2021-12-07 00:57:28,555 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-07 00:57:28,559 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-07 00:57:28,560 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-07 00:57:28,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-07 00:57:28,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-07 00:57:28,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-07 00:57:28,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-07 00:57:28,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-07 00:57:28,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:57:28,590 INFO L158 Benchmark]: Toolchain (without parser) took 512199.25ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 87.0MB in the beginning and 67.2MB in the end (delta: 19.8MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,590 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:57:28,590 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.02ms. Allocated memory is still 130.0MB. Free memory was 86.9MB in the beginning and 102.9MB in the end (delta: -16.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.86ms. Allocated memory is still 130.0MB. Free memory was 102.9MB in the beginning and 101.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:57:28,591 INFO L158 Benchmark]: Boogie Preprocessor took 17.95ms. Allocated memory is still 130.0MB. Free memory was 101.4MB in the beginning and 100.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,591 INFO L158 Benchmark]: RCFGBuilder took 229.46ms. Allocated memory is still 130.0MB. Free memory was 100.3MB in the beginning and 89.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,591 INFO L158 Benchmark]: TraceAbstraction took 511692.83ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 88.9MB in the beginning and 70.4MB in the end (delta: 18.5MB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,591 INFO L158 Benchmark]: Witness Printer took 36.89ms. Allocated memory is still 165.7MB. Free memory was 70.4MB in the beginning and 67.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-07 00:57:28,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.02ms. Allocated memory is still 130.0MB. Free memory was 86.9MB in the beginning and 102.9MB in the end (delta: -16.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.86ms. Allocated memory is still 130.0MB. Free memory was 102.9MB in the beginning and 101.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.95ms. Allocated memory is still 130.0MB. Free memory was 101.4MB in the beginning and 100.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 229.46ms. Allocated memory is still 130.0MB. Free memory was 100.3MB in the beginning and 89.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 511692.83ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 88.9MB in the beginning and 70.4MB in the end (delta: 18.5MB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. * Witness Printer took 36.89ms. Allocated memory is still 165.7MB. Free memory was 70.4MB in the beginning and 67.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 511.6s, OverallIterations: 20, TraceHistogramMax: 29, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 29.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 768 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 680 mSDsluCounter, 5761 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 32 IncrementalHoareTripleChecker+Unchecked, 4818 mSDsCounter, 1117 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4778 IncrementalHoareTripleChecker+Invalid, 5927 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1117 mSolverCounterUnsat, 943 mSDtfsCounter, 4778 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3379 GetRequests, 2977 SyntacticMatches, 21 SemanticMatches, 381 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 104.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=312occurred in iteration=11, InterpolantAutomatonStates: 239, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 155 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 331 PreInvPairs, 419 NumberOfFragments, 1719 HoareAnnotationTreeSize, 331 FomulaSimplifications, 6611 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 17 FomulaSimplificationsInter, 26886 FormulaSimplificationTreeSizeReductionInter, 28.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 456.2s InterpolantComputationTime, 1930 NumberOfCodeBlocks, 1709 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3111 ConstructedInterpolants, 1 QuantifiedInterpolants, 11275 SizeOfPredicates, 120 NumberOfNonLiveVariables, 4100 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 12650/13397 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((((p == 0 && a == y) && 2 * b + c == a) && y * x == xy) && 2 * b + c <= 2) && q == 1) && s == 0) && 1 <= x) && r == 1) && b < a) && y * s + x == b) && k * b + c == a) || (((((((((((((a == y && a <= 2) && 1 <= c) && y * x == xy) && 1 <= b) && q == 1) && 1 <= x) && c <= 2) && r == 1) && b < a) && y * s + x == b) && x <= 2) && k * b + c == a) && a == x * p + y * r)) || (((((((((((((yy == y * y && 1 <= y) && y * x == xy) && b == x * q + y * s) && b <= 2) && r == 0) && q == 0) && k == 0) && 1 <= x) && a == x) && x <= 2) && k * b + c == a) && a == x * p + y * r) && s == 1)) || ((((((((((((((yy == y * y && 1 <= y) && y * x == xy) && ((2 * b <= c || b == c) || c < b)) && b == x * q + y * s) && r == 0) && q == 0) && (b <= 1 || c <= 2 * b)) && 1 <= x) && (c == 0 || b <= c)) && a == x) && x <= 2) && k * b + c == a) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((((c < 2 * b && a == y) && a <= 2) && y * x == xy) && q == 1) && 1 <= x) && b <= c) && r == 1) && b < a) && y * s + x == b) && x <= 2) && a == x * p + y * r) || (((((((((0 <= b && y <= 2) && 1 <= y) && 0 == x * q + y * s) && 2 * b < 2) && 0 <= c) && 1 <= x) && 2 * c < 2) && x <= 2) && a == x * p + y * r)) || ((((((((((((c == 0 && yy == y * y) && y * x == xy) && b == x * q + y * s) && 1 <= b) && r == 0) && q == 0) && 1 <= x) && a == x) && b + c <= 2) && x <= 2) && a == x * p + y * r) && s == 1) RESULT: Ultimate proved your program to be correct! [2021-12-07 00:57:28,802 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-07 00:57:28,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a35723a-eba7-4ba0-ab8f-ed6356c2a80f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE