./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur --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 82dba59912342fc33baf6f71838a6b7d05440c02338f64f7b1e8151e293c49a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:15:08,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:15:08,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:15:08,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:15:08,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:15:08,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:15:08,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:15:08,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:15:08,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:15:08,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:15:08,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:15:08,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:15:08,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:15:08,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:15:08,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:15:08,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:15:08,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:15:08,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:15:08,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:15:08,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:15:08,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:15:08,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:15:08,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:15:08,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:15:08,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:15:08,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:15:08,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:15:08,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:15:08,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:15:08,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:15:08,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:15:08,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:15:08,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:15:08,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:15:08,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:15:08,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:15:08,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:15:08,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:15:08,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:15:08,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:15:08,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:15:08,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:15:08,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:15:08,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:15:08,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:15:08,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:15:08,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:15:08,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:15:08,693 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:15:08,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:15:08,693 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:15:08,693 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:15:08,695 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:15:08,695 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:15:08,695 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:15:08,695 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:15:08,696 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:15:08,696 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:15:08,696 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:15:08,696 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:15:08,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:15:08,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:15:08,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:15:08,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:15:08,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:15:08,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:15:08,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:15:08,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:15:08,699 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:15:08,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:15:08,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:15:08,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:15:08,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:15:08,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:15:08,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:15:08,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:15:08,702 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:15:08,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:15:08,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:15:08,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:15:08,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:15:08,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:15:08,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:15:08,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82dba59912342fc33baf6f71838a6b7d05440c02338f64f7b1e8151e293c49a7 [2022-11-25 22:15:09,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:15:09,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:15:09,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:15:09,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:15:09,056 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:15:09,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2022-11-25 22:15:12,099 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:15:12,285 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:15:12,286 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2022-11-25 22:15:12,292 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/data/3c742d88a/99569e653a78474db172b88080e5e90f/FLAGb66c0331c [2022-11-25 22:15:12,311 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/data/3c742d88a/99569e653a78474db172b88080e5e90f [2022-11-25 22:15:12,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:15:12,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:15:12,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:12,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:15:12,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:15:12,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1c31f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12, skipping insertion in model container [2022-11-25 22:15:12,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:15:12,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:15:12,507 WARN L237 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_4d16a89c-934c-4dce-923b-478a83296996/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c[454,467] [2022-11-25 22:15:12,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:12,539 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:15:12,548 WARN L237 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_4d16a89c-934c-4dce-923b-478a83296996/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c[454,467] [2022-11-25 22:15:12,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:12,566 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:15:12,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12 WrapperNode [2022-11-25 22:15:12,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:12,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:15:12,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:15:12,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:15:12,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,596 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-11-25 22:15:12,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:15:12,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:15:12,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:15:12,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:15:12,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:15:12,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:15:12,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:15:12,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:15:12,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (1/1) ... [2022-11-25 22:15:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:15:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:12,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:15:12,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:15:12,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:15:12,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:15:12,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:15:12,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:15:12,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:15:12,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:15:12,780 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:15:12,783 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:15:12,959 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:15:12,984 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:15:12,984 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:15:12,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:15:12 BoogieIcfgContainer [2022-11-25 22:15:12,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:15:12,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:15:12,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:15:12,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:15:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:15:12" (1/3) ... [2022-11-25 22:15:12,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171f0cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:15:12, skipping insertion in model container [2022-11-25 22:15:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:12" (2/3) ... [2022-11-25 22:15:12,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171f0cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:15:12, skipping insertion in model container [2022-11-25 22:15:12,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:15:12" (3/3) ... [2022-11-25 22:15:12,997 INFO L112 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound50.c [2022-11-25 22:15:13,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:15:13,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:15:13,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:15:13,140 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2977fe80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:15:13,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:15:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:15:13,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:13,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:15:13,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2109616992, now seen corresponding path program 1 times [2022-11-25 22:15:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:13,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202971406] [2022-11-25 22:15:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:13,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:13,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202971406] [2022-11-25 22:15:13,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 22:15:13,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579590979] [2022-11-25 22:15:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:13,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:13,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:15:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 22:15:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:13,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:15:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579590979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:15:13,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:15:13,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:15:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037969053] [2022-11-25 22:15:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:15:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:15:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:15:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:15:13,535 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:13,583 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-25 22:15:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:15:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:15:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:13,594 INFO L225 Difference]: With dead ends: 27 [2022-11-25 22:15:13,594 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:15:13,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:15:13,604 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:13,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:15:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:15:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 22:15:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:15:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-25 22:15:13,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-11-25 22:15:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:13,649 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-25 22:15:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-25 22:15:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:15:13,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:13,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:13,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 22:15:13,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash 574117089, now seen corresponding path program 1 times [2022-11-25 22:15:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699754731] [2022-11-25 22:15:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:13,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:13,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699754731] [2022-11-25 22:15:13,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 22:15:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610947452] [2022-11-25 22:15:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:13,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:13,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:13,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:15:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:13,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:15:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:14,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:15:14,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610947452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:15:14,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:15:14,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:15:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337992644] [2022-11-25 22:15:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:15:14,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:15:14,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:14,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:15:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:15:14,038 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:14,054 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-25 22:15:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:15:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:15:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:14,055 INFO L225 Difference]: With dead ends: 21 [2022-11-25 22:15:14,055 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 22:15:14,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:15:14,057 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:14,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:15:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 22:15:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 22:15:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:15:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-25 22:15:14,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-11-25 22:15:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:14,063 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-25 22:15:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-25 22:15:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:15:14,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:14,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:14,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:14,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 575904549, now seen corresponding path program 1 times [2022-11-25 22:15:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:14,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311704043] [2022-11-25 22:15:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:14,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232146406] [2022-11-25 22:15:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:14,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:14,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:14,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:14,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:15:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:15:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:14,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:15:14,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311704043] [2022-11-25 22:15:14,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:14,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232146406] [2022-11-25 22:15:14,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232146406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:15:14,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:15:14,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:15:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617608553] [2022-11-25 22:15:14,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:15:14,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:15:14,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:15:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:15:14,406 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:14,450 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-25 22:15:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:15:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:15:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:14,451 INFO L225 Difference]: With dead ends: 23 [2022-11-25 22:15:14,451 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 22:15:14,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:15:14,453 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:14,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:15:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 22:15:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-25 22:15:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-25 22:15:14,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2022-11-25 22:15:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:14,460 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-25 22:15:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-25 22:15:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:15:14,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:14,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:14,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:14,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1061254824, now seen corresponding path program 1 times [2022-11-25 22:15:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424568948] [2022-11-25 22:15:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:14,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:14,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667369153] [2022-11-25 22:15:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:14,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:15:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:14,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:15:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:14,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:14,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424568948] [2022-11-25 22:15:14,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667369153] [2022-11-25 22:15:14,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667369153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150117844] [2022-11-25 22:15:14,925 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 22:15:14,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:14,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:14,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:14,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:16,135 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 22:15:16,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:16,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:16,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:16,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:16,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 22:15:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304953894] [2022-11-25 22:15:16,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:15:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:15:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:15:16,505 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:16,605 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-25 22:15:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:15:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-25 22:15:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:16,611 INFO L225 Difference]: With dead ends: 51 [2022-11-25 22:15:16,611 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 22:15:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:15:16,613 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:15:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 22:15:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-11-25 22:15:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:15:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-25 22:15:16,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-11-25 22:15:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:16,631 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-25 22:15:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-25 22:15:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:15:16,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:16,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:16,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 22:15:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:16,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1063042284, now seen corresponding path program 1 times [2022-11-25 22:15:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327828721] [2022-11-25 22:15:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:16,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82855069] [2022-11-25 22:15:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:16,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:16,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:16,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:15:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 22:15:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:17,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327828721] [2022-11-25 22:15:17,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82855069] [2022-11-25 22:15:17,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82855069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953516964] [2022-11-25 22:15:17,137 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 22:15:17,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:17,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:17,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:17,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:17,848 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-25 22:15:17,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:18,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '565#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:18,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:18,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:18,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-25 22:15:18,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191595138] [2022-11-25 22:15:18,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:18,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:15:18,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:15:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:15:18,534 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:18,613 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-25 22:15:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:15:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-25 22:15:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:18,615 INFO L225 Difference]: With dead ends: 40 [2022-11-25 22:15:18,615 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 22:15:18,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:15:18,617 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:18,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 49 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 22:15:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 22:15:18,618 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) [2022-11-25 22:15:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 22:15:18,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2022-11-25 22:15:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:18,619 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 22:15:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 22:15:18,620 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 22:15:18,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 22:15:18,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:18,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:18,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 22:15:18,879 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 22:15:18,879 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-11-25 22:15:18,879 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-11-25 22:15:18,880 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-11-25 22:15:18,880 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 22:15:18,880 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) [2022-11-25 22:15:18,880 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-11-25 22:15:18,880 INFO L902 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: true [2022-11-25 22:15:18,881 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-11-25 22:15:18,881 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-11-25 22:15:18,881 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-11-25 22:15:18,881 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-11-25 22:15:18,881 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-11-25 22:15:18,882 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-11-25 22:15:18,885 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 22:15:18,888 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 22:15:18,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 10:15:18 BoogieIcfgContainer [2022-11-25 22:15:18,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 22:15:18,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 22:15:18,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 22:15:18,905 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 22:15:18,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:15:12" (3/4) ... [2022-11-25 22:15:18,910 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 22:15:18,916 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 22:15:18,920 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-25 22:15:18,920 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-25 22:15:18,920 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 22:15:18,920 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 22:15:18,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 22:15:18,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 22:15:18,964 INFO L158 Benchmark]: Toolchain (without parser) took 6649.59ms. Allocated memory was 165.7MB in the beginning and 199.2MB in the end (delta: 33.6MB). Free memory was 121.0MB in the beginning and 107.0MB in the end (delta: 13.9MB). Peak memory consumption was 49.2MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,965 INFO L158 Benchmark]: CDTParser took 10.52ms. Allocated memory is still 127.9MB. Free memory was 72.0MB in the beginning and 96.6MB in the end (delta: -24.6MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,966 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 165.7MB. Free memory was 120.6MB in the beginning and 110.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,966 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.54ms. Allocated memory is still 165.7MB. Free memory was 110.5MB in the beginning and 109.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,966 INFO L158 Benchmark]: Boogie Preprocessor took 18.48ms. Allocated memory is still 165.7MB. Free memory was 109.0MB in the beginning and 108.0MB in the end (delta: 987.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 22:15:18,968 INFO L158 Benchmark]: RCFGBuilder took 370.83ms. Allocated memory is still 165.7MB. Free memory was 108.0MB in the beginning and 97.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,968 INFO L158 Benchmark]: TraceAbstraction took 5914.36ms. Allocated memory was 165.7MB in the beginning and 199.2MB in the end (delta: 33.6MB). Free memory was 96.9MB in the beginning and 109.1MB in the end (delta: -12.2MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,971 INFO L158 Benchmark]: Witness Printer took 58.77ms. Allocated memory is still 199.2MB. Free memory was 109.1MB in the beginning and 107.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:15:18,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 10.52ms. Allocated memory is still 127.9MB. Free memory was 72.0MB in the beginning and 96.6MB in the end (delta: -24.6MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 165.7MB. Free memory was 120.6MB in the beginning and 110.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.54ms. Allocated memory is still 165.7MB. Free memory was 110.5MB in the beginning and 109.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.48ms. Allocated memory is still 165.7MB. Free memory was 109.0MB in the beginning and 108.0MB in the end (delta: 987.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 370.83ms. Allocated memory is still 165.7MB. Free memory was 108.0MB in the beginning and 97.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5914.36ms. Allocated memory was 165.7MB in the beginning and 199.2MB in the end (delta: 33.6MB). Free memory was 96.9MB in the beginning and 109.1MB in the end (delta: -12.2MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * Witness Printer took 58.77ms. Allocated memory is still 199.2MB. Free memory was 109.1MB in the beginning and 107.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 189 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 130 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 120 IncrementalHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 59 mSDtfsCounter, 120 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 29 HoareAnnotationTreeSize, 16 FomulaSimplifications, 52 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 108 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 236 SizeOfPredicates, 4 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/18 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: 27]: Loop Invariant Derived loop invariant: 2 * x == y + y * y - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-25 22:15:19,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d16a89c-934c-4dce-923b-478a83296996/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE