./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc77cb5fe4af5100e01bafbf150d5df54332b351a9f9d4040d6b54bbf20f5710 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:32:00,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:32:00,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:32:00,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:32:00,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:32:00,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:32:00,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:32:00,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:32:00,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:32:00,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:32:00,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:32:00,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:32:00,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:32:00,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:32:00,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:32:00,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:32:00,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:32:00,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:32:00,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:32:00,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:32:00,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:32:00,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:32:00,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:32:00,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:32:00,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:32:00,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:32:00,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:32:00,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:32:00,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:32:00,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:32:00,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:32:00,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:32:00,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:32:00,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:32:00,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:32:00,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:32:00,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:32:00,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:32:00,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:32:00,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:32:00,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:32:00,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:32:00,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:32:00,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:32:00,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:32:00,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:32:00,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:32:00,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:32:00,764 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:32:00,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:32:00,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:32:00,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:32:00,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:32:00,765 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:32:00,765 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:32:00,765 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:32:00,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:32:00,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:32:00,766 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:32:00,766 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:32:00,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:32:00,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:32:00,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:32:00,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:32:00,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:32:00,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:32:00,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:32:00,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:32:00,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:32:00,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:32:00,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:32:00,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:32:00,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:32:00,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:32:00,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:32:00,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:32:00,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:32:00,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:32:00,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:32:00,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:32:00,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:32:00,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:32:00,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:32:00,772 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc77cb5fe4af5100e01bafbf150d5df54332b351a9f9d4040d6b54bbf20f5710 [2021-11-23 03:32:01,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:32:01,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:32:01,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:32:01,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:32:01,152 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:32:01,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-11-23 03:32:01,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/data/e32dc4d3d/ec2ad433a2394118a26c16711a9b658f/FLAG8e61ac9b4 [2021-11-23 03:32:01,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:32:01,868 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-11-23 03:32:01,876 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/data/e32dc4d3d/ec2ad433a2394118a26c16711a9b658f/FLAG8e61ac9b4 [2021-11-23 03:32:02,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/data/e32dc4d3d/ec2ad433a2394118a26c16711a9b658f [2021-11-23 03:32:02,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:32:02,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:32:02,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:32:02,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:32:02,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:32:02,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd15354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02, skipping insertion in model container [2021-11-23 03:32:02,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:32:02,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:32:02,552 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_ba98e987-a74c-4664-a2d2-104f223ec42a/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-11-23 03:32:02,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:32:02,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:32:02,603 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_ba98e987-a74c-4664-a2d2-104f223ec42a/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-11-23 03:32:02,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:32:02,647 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:32:02,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02 WrapperNode [2021-11-23 03:32:02,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:32:02,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:02,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:32:02,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:32:02,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,694 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-11-23 03:32:02,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:02,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:32:02,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:32:02,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:32:02,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:32:02,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:32:02,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:32:02,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:32:02,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (1/1) ... [2021-11-23 03:32:02,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:32:02,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:02,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:32:02,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:32:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:32:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:32:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:32:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:32:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:32:02,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:32:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:32:02,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:32:02,916 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:32:02,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:32:03,118 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:32:03,170 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:32:03,170 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:32:03,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:03 BoogieIcfgContainer [2021-11-23 03:32:03,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:32:03,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:32:03,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:32:03,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:32:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:32:02" (1/3) ... [2021-11-23 03:32:03,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107dcb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:03, skipping insertion in model container [2021-11-23 03:32:03,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:02" (2/3) ... [2021-11-23 03:32:03,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107dcb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:03, skipping insertion in model container [2021-11-23 03:32:03,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:03" (3/3) ... [2021-11-23 03:32:03,185 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.c [2021-11-23 03:32:03,191 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:32:03,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:32:03,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:32:03,296 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:32:03,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:32:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 03:32:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:32:03,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:03,322 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:03,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1295267661, now seen corresponding path program 1 times [2021-11-23 03:32:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:03,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35505497] [2021-11-23 03:32:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:03,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:03,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948976020] [2021-11-23 03:32:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:03,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:03,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:03,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:32:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:03,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:32:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:32:03,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:03,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:03,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35505497] [2021-11-23 03:32:03,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:03,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948976020] [2021-11-23 03:32:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948976020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:03,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:03,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:32:03,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172985569] [2021-11-23 03:32:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:03,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:32:03,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:32:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:03,909 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:32:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,202 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2021-11-23 03:32:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-11-23 03:32:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,215 INFO L225 Difference]: With dead ends: 61 [2021-11-23 03:32:04,215 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:32:04,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:32:04,224 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:32:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:32:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-23 03:32:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 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) [2021-11-23 03:32:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-23 03:32:04,279 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-11-23 03:32:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-23 03:32:04,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:32:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-23 03:32:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:32:04,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,283 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:04,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 03:32:04,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1188978483, now seen corresponding path program 1 times [2021-11-23 03:32:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011138820] [2021-11-23 03:32:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:04,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018663825] [2021-11-23 03:32:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:04,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:04,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:32:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:32:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:32:04,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:04,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011138820] [2021-11-23 03:32:04,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:04,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018663825] [2021-11-23 03:32:04,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018663825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:32:04,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604333776] [2021-11-23 03:32:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:32:04,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:32:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:04,861 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:32:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:05,014 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-11-23 03:32:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-11-23 03:32:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:05,016 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:32:05,017 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 03:32:05,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:32:05,019 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 03:32:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-23 03:32:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 03:32:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-11-23 03:32:05,035 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 22 [2021-11-23 03:32:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:05,035 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-23 03:32:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:32:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-11-23 03:32:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:32:05,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:05,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:05,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:05,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1634696502, now seen corresponding path program 1 times [2021-11-23 03:32:05,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619603933] [2021-11-23 03:32:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:05,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:05,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954677188] [2021-11-23 03:32:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:05,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:05,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:32:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:32:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:32:05,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:05,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619603933] [2021-11-23 03:32:05,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954677188] [2021-11-23 03:32:05,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954677188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:05,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:05,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:32:05,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235256625] [2021-11-23 03:32:05,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:05,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:05,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:05,466 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:32:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:05,588 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2021-11-23 03:32:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:32:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2021-11-23 03:32:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:05,595 INFO L225 Difference]: With dead ends: 72 [2021-11-23 03:32:05,595 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 03:32:05,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:32:05,597 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:05,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 03:32:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-11-23 03:32:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 03:32:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-23 03:32:05,628 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 29 [2021-11-23 03:32:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:05,629 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-23 03:32:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:32:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-23 03:32:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:32:05,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:05,637 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:05,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:05,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586486, now seen corresponding path program 1 times [2021-11-23 03:32:05,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32211499] [2021-11-23 03:32:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:05,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:05,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835439960] [2021-11-23 03:32:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:05,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:05,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:32:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:32:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:32:06,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:06,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32211499] [2021-11-23 03:32:06,106 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835439960] [2021-11-23 03:32:06,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835439960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:06,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:06,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:32:06,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993268040] [2021-11-23 03:32:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:06,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:32:06,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:32:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:32:06,112 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 03:32:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:06,238 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2021-11-23 03:32:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:32:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2021-11-23 03:32:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:06,246 INFO L225 Difference]: With dead ends: 69 [2021-11-23 03:32:06,246 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 03:32:06,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:32:06,258 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:06,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 03:32:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-23 03:32:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 03:32:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-23 03:32:06,284 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 39 [2021-11-23 03:32:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:06,285 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-23 03:32:06,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 03:32:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-23 03:32:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:32:06,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:06,291 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:06,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:32:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:06,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1800198356, now seen corresponding path program 1 times [2021-11-23 03:32:06,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749760471] [2021-11-23 03:32:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:06,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:06,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767474295] [2021-11-23 03:32:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:06,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:06,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:06,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:32:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:06,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:32:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:32:06,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:32:07,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749760471] [2021-11-23 03:32:07,077 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:07,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767474295] [2021-11-23 03:32:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767474295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:07,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713922097] [2021-11-23 03:32:07,101 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:32:07,102 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:07,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:07,112 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:07,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:08,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2021-11-23 03:32:08,398 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:32:08,401 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:09,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1358#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:09,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:09,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:32:09,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-23 03:32:09,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979990246] [2021-11-23 03:32:09,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:09,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:32:09,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:32:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:32:09,752 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 03:32:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:09,918 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2021-11-23 03:32:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:09,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 45 [2021-11-23 03:32:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:09,921 INFO L225 Difference]: With dead ends: 73 [2021-11-23 03:32:09,921 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 03:32:09,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:32:09,926 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:09,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 82 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 03:32:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-23 03:32:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 03:32:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-11-23 03:32:09,958 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 45 [2021-11-23 03:32:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:09,958 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-11-23 03:32:09,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 03:32:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-11-23 03:32:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 03:32:09,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:09,960 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:10,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:10,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:10,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 900265930, now seen corresponding path program 1 times [2021-11-23 03:32:10,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779909682] [2021-11-23 03:32:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:10,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:10,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:10,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682333826] [2021-11-23 03:32:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:10,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:10,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:10,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:10,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:32:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:32:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 03:32:10,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 03:32:10,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779909682] [2021-11-23 03:32:10,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682333826] [2021-11-23 03:32:10,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682333826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170893631] [2021-11-23 03:32:10,684 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:32:10,685 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:10,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:10,685 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:10,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:17,405 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2021-11-23 03:32:17,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:32:17,417 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:19,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1910#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:19,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:19,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:32:19,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 03:32:19,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233373804] [2021-11-23 03:32:19,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:19,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:32:19,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:32:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:32:19,254 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-23 03:32:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:19,656 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2021-11-23 03:32:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 52 [2021-11-23 03:32:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:19,657 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:32:19,658 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:32:19,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 125 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:32:19,660 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:19,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 156 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:32:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:32:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:32:19,661 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) [2021-11-23 03:32:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:32:19,662 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2021-11-23 03:32:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:32:19,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-23 03:32:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:32:19,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:32:19,665 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:32:19,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:19,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:32:19,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:32:21,116 INFO L854 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5)) [2021-11-23 03:32:21,116 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-23 03:32:21,116 INFO L861 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2021-11-23 03:32:21,116 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-11-23 03:32:21,116 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|)) [2021-11-23 03:32:21,117 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|)) [2021-11-23 03:32:21,117 INFO L858 garLoopResultBuilder]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-11-23 03:32:21,117 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:32:21,117 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|)) [2021-11-23 03:32:21,117 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:32:21,117 INFO L861 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2021-11-23 03:32:21,117 INFO L854 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 5) (<= 0 |ULTIMATE.start_main_~y~0#1|)) [2021-11-23 03:32:21,118 INFO L858 garLoopResultBuilder]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-11-23 03:32:21,118 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|)) [2021-11-23 03:32:21,118 INFO L854 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~y~0#1| 5))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0)) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|)))) [2021-11-23 03:32:21,118 INFO L854 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) (= .cse0 |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|))) [2021-11-23 03:32:21,118 INFO L858 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-11-23 03:32:21,118 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|)) [2021-11-23 03:32:21,119 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-11-23 03:32:21,119 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|)) [2021-11-23 03:32:21,119 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|)) [2021-11-23 03:32:21,119 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-11-23 03:32:21,119 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-11-23 03:32:21,120 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-23 03:32:21,120 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-23 03:32:21,120 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-23 03:32:21,120 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-23 03:32:21,120 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-23 03:32:21,120 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-23 03:32:21,123 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-23 03:32:21,125 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:32:21,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:32:21 BoogieIcfgContainer [2021-11-23 03:32:21,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:32:21,138 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:32:21,138 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:32:21,138 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:32:21,139 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:03" (3/4) ... [2021-11-23 03:32:21,141 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:32:21,145 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-23 03:32:21,145 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-23 03:32:21,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-23 03:32:21,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 03:32:21,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 03:32:21,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:32:21,181 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:32:21,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:32:21,182 INFO L158 Benchmark]: Toolchain (without parser) took 18908.53ms. Allocated memory was 79.7MB in the beginning and 276.8MB in the end (delta: 197.1MB). Free memory was 41.5MB in the beginning and 174.5MB in the end (delta: -133.0MB). Peak memory consumption was 64.4MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,182 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 79.7MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:32:21,182 INFO L158 Benchmark]: CACSL2BoogieTranslator took 373.01ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 41.3MB in the beginning and 81.2MB in the end (delta: -39.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,183 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.28ms. Allocated memory is still 104.9MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,183 INFO L158 Benchmark]: Boogie Preprocessor took 33.52ms. Allocated memory is still 104.9MB. Free memory was 79.6MB in the beginning and 79.0MB in the end (delta: 613.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:32:21,183 INFO L158 Benchmark]: RCFGBuilder took 444.07ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 68.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,184 INFO L158 Benchmark]: TraceAbstraction took 17961.45ms. Allocated memory was 104.9MB in the beginning and 276.8MB in the end (delta: 172.0MB). Free memory was 67.5MB in the beginning and 177.7MB in the end (delta: -110.2MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,184 INFO L158 Benchmark]: Witness Printer took 42.84ms. Allocated memory is still 276.8MB. Free memory was 177.7MB in the beginning and 174.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:32:21,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 79.7MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 373.01ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 41.3MB in the beginning and 81.2MB in the end (delta: -39.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.28ms. Allocated memory is still 104.9MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.52ms. Allocated memory is still 104.9MB. Free memory was 79.6MB in the beginning and 79.0MB in the end (delta: 613.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 444.07ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 68.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 17961.45ms. Allocated memory was 104.9MB in the beginning and 276.8MB in the end (delta: 172.0MB). Free memory was 67.5MB in the beginning and 177.7MB in the end (delta: -110.2MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. * Witness Printer took 42.84ms. Allocated memory is still 276.8MB. Free memory was 177.7MB in the beginning and 174.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.9s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 146 mSDsluCounter, 752 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 617 mSDsCounter, 123 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 537 IncrementalHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 123 mSolverCounterUnsat, 177 mSDtfsCounter, 537 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 402 GetRequests, 308 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=5, InterpolantAutomatonStates: 44, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 55 PreInvPairs, 99 NumberOfFragments, 225 HoareAnnotationTreeSize, 55 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1644 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 204 NumberOfCodeBlocks, 204 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 293 ConstructedInterpolants, 0 QuantifiedInterpolants, 751 SizeOfPredicates, 21 NumberOfNonLiveVariables, 631 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 320/340 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: 64]: Loop Invariant Derived loop invariant: 1 <= y && y <= 5 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((y * q + r == x && 1 <= y) && y <= 5) && y * a == b) && 1 <= r - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((y * q + r == x && 1 <= y) && y <= 5) && y * a == b RESULT: Ultimate proved your program to be correct! [2021-11-23 03:32:21,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba98e987-a74c-4664-a2d2-104f223ec42a/bin/utaipan-EQgc7hIp5V/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