./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/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 74ee724e3f951f784979d99a99eb9387abbe4e82f01cf4b5e019c1ec7f3be827 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:45:38,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:45:38,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:45:38,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:45:38,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:45:38,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:45:38,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:45:38,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:45:38,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:45:38,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:45:38,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:45:38,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:45:38,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:45:38,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:45:38,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:45:38,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:45:38,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:45:38,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:45:38,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:45:38,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:45:38,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:45:38,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:45:38,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:45:38,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:45:38,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:45:38,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:45:38,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:45:38,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:45:38,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:45:38,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:45:38,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:45:38,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:45:38,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:45:38,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:45:38,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:45:38,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:45:38,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:45:38,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:45:38,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:45:38,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:45:38,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:45:38,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:45:38,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:45:38,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:45:38,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:45:38,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:45:38,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:45:38,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:45:38,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:45:38,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:45:38,856 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:45:38,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:45:38,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:45:38,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:45:38,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:45:38,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:45:38,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:45:38,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:45:38,860 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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74ee724e3f951f784979d99a99eb9387abbe4e82f01cf4b5e019c1ec7f3be827 [2021-12-06 21:45:39,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:45:39,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:45:39,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:45:39,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:45:39,071 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:45:39,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-12-06 21:45:39,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/data/47ec65891/3f9fe4d134344bf79f4aad169539ca7b/FLAG817d47585 [2021-12-06 21:45:39,494 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:45:39,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-12-06 21:45:39,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/data/47ec65891/3f9fe4d134344bf79f4aad169539ca7b/FLAG817d47585 [2021-12-06 21:45:39,508 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/data/47ec65891/3f9fe4d134344bf79f4aad169539ca7b [2021-12-06 21:45:39,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:45:39,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:45:39,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:45:39,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:45:39,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:45:39,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7530fb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39, skipping insertion in model container [2021-12-06 21:45:39,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:45:39,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:45:39,642 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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] [2021-12-06 21:45:39,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:45:39,660 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:45:39,669 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_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] [2021-12-06 21:45:39,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:45:39,684 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:45:39,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39 WrapperNode [2021-12-06 21:45:39,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:45:39,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:45:39,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:45:39,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:45:39,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,716 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-12-06 21:45:39,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:45:39,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:45:39,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:45:39,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:45:39,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:45:39,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:45:39,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:45:39,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:45:39,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (1/1) ... [2021-12-06 21:45:39,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:45:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:39,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:45:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:45:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:45:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:45:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:45:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:45:39,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 21:45:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 21:45:39,831 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:45:39,832 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:45:39,905 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:45:39,909 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:45:39,909 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:45:39,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:39 BoogieIcfgContainer [2021-12-06 21:45:39,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:45:39,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:45:39,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:45:39,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:45:39,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:45:39" (1/3) ... [2021-12-06 21:45:39,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1ec085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:45:39, skipping insertion in model container [2021-12-06 21:45:39,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:39" (2/3) ... [2021-12-06 21:45:39,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1ec085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:45:39, skipping insertion in model container [2021-12-06 21:45:39,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:39" (3/3) ... [2021-12-06 21:45:39,916 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.c [2021-12-06 21:45:39,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:45:39,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:45:39,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:45:39,959 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:45:39,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:45:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:45:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 21:45:39,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:39,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:39,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-12-06 21:45:39,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:39,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618000319] [2021-12-06 21:45:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:39,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:40,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618000319] [2021-12-06 21:45:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618000319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:40,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:40,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:45:40,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502744381] [2021-12-06 21:45:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:40,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:45:40,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:45:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:45:40,108 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:40,123 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-12-06 21:45:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:45:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 21:45:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:40,132 INFO L225 Difference]: With dead ends: 40 [2021-12-06 21:45:40,133 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 21:45:40,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:45:40,139 INFO L933 BasicCegarLoop]: 27 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, 27 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 [2021-12-06 21:45:40,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 21:45:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 21:45:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 21:45:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-12-06 21:45:40,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-12-06 21:45:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:40,176 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-12-06 21:45:40,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-12-06 21:45:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:45:40,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:40,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:40,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:45:40,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-12-06 21:45:40,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:40,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236100157] [2021-12-06 21:45:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:40,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236100157] [2021-12-06 21:45:40,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236100157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:40,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:40,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:45:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014410205] [2021-12-06 21:45:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:45:40,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:45:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:40,226 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:40,241 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-12-06 21:45:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:45:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:45:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:40,243 INFO L225 Difference]: With dead ends: 28 [2021-12-06 21:45:40,243 INFO L226 Difference]: Without dead ends: 19 [2021-12-06 21:45:40,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:40,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:40,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-06 21:45:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-06 21:45:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 21:45:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-12-06 21:45:40,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2021-12-06 21:45:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:40,250 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-12-06 21:45:40,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-12-06 21:45:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:45:40,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:40,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:45:40,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-12-06 21:45:40,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677940476] [2021-12-06 21:45:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:40,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:40,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677940476] [2021-12-06 21:45:40,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677940476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:40,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:40,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:45:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012980778] [2021-12-06 21:45:40,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:40,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:40,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:40,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:40,325 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:40,371 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-12-06 21:45:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:45:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:45:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:40,373 INFO L225 Difference]: With dead ends: 32 [2021-12-06 21:45:40,373 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 21:45:40,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:40,374 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 21:45:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-06 21:45:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:45:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-06 21:45:40,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2021-12-06 21:45:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:40,384 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-06 21:45:40,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-06 21:45:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 21:45:40,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:40,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:40,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:45:40,385 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-12-06 21:45:40,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:40,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380369732] [2021-12-06 21:45:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:40,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490696405] [2021-12-06 21:45:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:40,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:40,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:45:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:45:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:40,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:40,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380369732] [2021-12-06 21:45:40,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490696405] [2021-12-06 21:45:40,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490696405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:40,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:40,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:45:40,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92427603] [2021-12-06 21:45:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:40,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:40,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:40,522 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:45:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:40,561 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-06 21:45:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-06 21:45:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:40,563 INFO L225 Difference]: With dead ends: 36 [2021-12-06 21:45:40,563 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 21:45:40,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:40,564 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:40,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 84 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 21:45:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-06 21:45:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:45:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-06 21:45:40,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2021-12-06 21:45:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-06 21:45:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:45:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-06 21:45:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:45:40,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:40,573 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:40,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:40,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:40,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-12-06 21:45:40,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771202381] [2021-12-06 21:45:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:40,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:40,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737344042] [2021-12-06 21:45:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:40,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:40,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:40,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:40,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:45:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:45:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:45:41,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771202381] [2021-12-06 21:45:41,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737344042] [2021-12-06 21:45:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737344042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:41,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:41,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:45:41,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94023471] [2021-12-06 21:45:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:41,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:41,078 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:45:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:41,104 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-12-06 21:45:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-06 21:45:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:41,106 INFO L225 Difference]: With dead ends: 40 [2021-12-06 21:45:41,106 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 21:45:41,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:41,107 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:41,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 21:45:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-06 21:45:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:45:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-06 21:45:41,113 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2021-12-06 21:45:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:41,113 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-06 21:45:41,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:45:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-06 21:45:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:45:41,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:41,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:41,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:45:41,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:41,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2021-12-06 21:45:41,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489454792] [2021-12-06 21:45:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:41,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:41,352 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:41,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810392710] [2021-12-06 21:45:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:41,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:41,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:45:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:45:41,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:45:41,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:45:41,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:41,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489454792] [2021-12-06 21:45:41,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:41,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810392710] [2021-12-06 21:45:41,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810392710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:41,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:41,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 21:45:41,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759606608] [2021-12-06 21:45:41,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:41,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:45:41,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:45:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:45:41,600 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:41,665 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-06 21:45:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:45:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2021-12-06 21:45:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:41,666 INFO L225 Difference]: With dead ends: 76 [2021-12-06 21:45:41,666 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 21:45:41,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:45:41,667 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:41,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 21:45:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-12-06 21:45:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:45:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-12-06 21:45:41,677 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 26 [2021-12-06 21:45:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-12-06 21:45:41,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-12-06 21:45:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:45:41,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:41,678 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:41,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:41,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:41,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2021-12-06 21:45:41,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:41,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061081619] [2021-12-06 21:45:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:41,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:41,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751825034] [2021-12-06 21:45:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:41,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:41,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:41,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:41,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:45:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 21:45:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:45:42,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 21:45:42,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061081619] [2021-12-06 21:45:42,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751825034] [2021-12-06 21:45:42,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751825034] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:42,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:42,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 21:45:42,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460154164] [2021-12-06 21:45:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:42,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:42,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:45:42,067 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:45:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:42,093 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-12-06 21:45:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-06 21:45:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:42,095 INFO L225 Difference]: With dead ends: 77 [2021-12-06 21:45:42,095 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 21:45:42,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:45:42,097 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:42,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 21:45:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-06 21:45:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:45:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-12-06 21:45:42,111 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 26 [2021-12-06 21:45:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:42,111 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-12-06 21:45:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:45:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-12-06 21:45:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 21:45:42,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:42,113 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:42,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:42,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 21:45:42,314 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash -857109600, now seen corresponding path program 2 times [2021-12-06 21:45:42,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:42,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29340755] [2021-12-06 21:45:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:42,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:42,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:42,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136039122] [2021-12-06 21:45:42,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:45:42,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:42,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:45:42,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:45:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:45:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 21:45:42,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 21:45:42,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29340755] [2021-12-06 21:45:42,596 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:42,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136039122] [2021-12-06 21:45:42,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136039122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:42,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:42,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-12-06 21:45:42,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125225004] [2021-12-06 21:45:42,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:42,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:45:42,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:45:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:45:42,598 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 21:45:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:42,723 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-12-06 21:45:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:45:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 31 [2021-12-06 21:45:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:42,726 INFO L225 Difference]: With dead ends: 90 [2021-12-06 21:45:42,726 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 21:45:42,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:45:42,728 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:42,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:45:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 21:45:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-12-06 21:45:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 21:45:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-12-06 21:45:42,742 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 31 [2021-12-06 21:45:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:42,742 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-12-06 21:45:42,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 21:45:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-12-06 21:45:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:45:42,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:42,744 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-12-06 21:45:42,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:45:42,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:42,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1192261919, now seen corresponding path program 3 times [2021-12-06 21:45:42,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:42,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868492712] [2021-12-06 21:45:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:42,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:42,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477649799] [2021-12-06 21:45:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:45:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:42,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:42,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:45:43,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 21:45:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 21:45:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 21:45:43,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 21:45:43,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868492712] [2021-12-06 21:45:43,523 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477649799] [2021-12-06 21:45:43,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477649799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:43,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:43,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 21:45:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680256357] [2021-12-06 21:45:43,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:43,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:45:43,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:45:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:45:43,525 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 21:45:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:43,726 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-12-06 21:45:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:45:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 54 [2021-12-06 21:45:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:43,728 INFO L225 Difference]: With dead ends: 80 [2021-12-06 21:45:43,728 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 21:45:43,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:45:43,729 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:43,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:45:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 21:45:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 21:45:43,731 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) [2021-12-06 21:45:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 21:45:43,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-12-06 21:45:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:43,731 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 21:45:43,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 21:45:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 21:45:43,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 21:45:43,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 21:45:43,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:43,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:43,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 21:45:44,428 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-12-06 21:45:44,429 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 21:45:44,429 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,429 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,429 INFO L861 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true [2021-12-06 21:45:44,429 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2021-12-06 21:45:44,429 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,430 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,430 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 21:45:44,430 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 21:45:44,430 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-12-06 21:45:44,430 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 21:45:44,430 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,430 INFO L854 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-12-06 21:45:44,430 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~t~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 1)) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1)))) [2021-12-06 21:45:44,431 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-12-06 21:45:44,431 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-12-06 21:45:44,431 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-12-06 21:45:44,431 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-12-06 21:45:44,431 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-12-06 21:45:44,431 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-12-06 21:45:44,434 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:44,435 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 21:45:44,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 09:45:44 BoogieIcfgContainer [2021-12-06 21:45:44,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 21:45:44,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 21:45:44,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 21:45:44,448 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 21:45:44,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:39" (3/4) ... [2021-12-06 21:45:44,451 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 21:45:44,456 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 21:45:44,460 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-06 21:45:44,460 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 21:45:44,460 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 21:45:44,460 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 21:45:44,484 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 21:45:44,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 21:45:44,485 INFO L158 Benchmark]: Toolchain (without parser) took 4973.29ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 87.2MB in the beginning and 62.5MB in the end (delta: 24.8MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,485 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 119.5MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:45:44,485 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.36ms. Allocated memory is still 119.5MB. Free memory was 87.0MB in the beginning and 77.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,486 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.03ms. Allocated memory is still 119.5MB. Free memory was 77.1MB in the beginning and 75.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,486 INFO L158 Benchmark]: Boogie Preprocessor took 15.38ms. Allocated memory is still 119.5MB. Free memory was 75.6MB in the beginning and 74.6MB in the end (delta: 972.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:45:44,486 INFO L158 Benchmark]: RCFGBuilder took 177.53ms. Allocated memory is still 119.5MB. Free memory was 74.5MB in the beginning and 93.6MB in the end (delta: -19.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,487 INFO L158 Benchmark]: TraceAbstraction took 4535.71ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 93.0MB in the beginning and 64.5MB in the end (delta: 28.4MB). Peak memory consumption was 54.3MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,487 INFO L158 Benchmark]: Witness Printer took 36.54ms. Allocated memory is still 146.8MB. Free memory was 64.5MB in the beginning and 62.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:45:44,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 119.5MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.36ms. Allocated memory is still 119.5MB. Free memory was 87.0MB in the beginning and 77.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.03ms. Allocated memory is still 119.5MB. Free memory was 77.1MB in the beginning and 75.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.38ms. Allocated memory is still 119.5MB. Free memory was 75.6MB in the beginning and 74.6MB in the end (delta: 972.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 177.53ms. Allocated memory is still 119.5MB. Free memory was 74.5MB in the beginning and 93.6MB in the end (delta: -19.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * TraceAbstraction took 4535.71ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 93.0MB in the beginning and 64.5MB in the end (delta: 28.4MB). Peak memory consumption was 54.3MB. Max. memory is 16.1GB. * Witness Printer took 36.54ms. Allocated memory is still 146.8MB. Free memory was 64.5MB in the beginning and 62.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 14]: 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 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 113 mSDsluCounter, 777 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 559 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 520 IncrementalHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 218 mSDtfsCounter, 520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=8, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 150 HoareAnnotationTreeSize, 44 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 794 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 191 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 1467 SizeOfPredicates, 10 NumberOfNonLiveVariables, 516 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 404/452 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: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && 4 * s == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2021-12-06 21:45:44,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ceb5d7-bf4a-465b-9368-d2cd1b2f7497/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE