./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/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_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/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_bb8557ed-af48-4c2a-aee8-8fa8675d5366/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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- 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 22:28:01,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:28:01,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:28:01,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:28:01,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:28:01,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:28:01,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:28:01,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:28:01,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:28:01,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:28:01,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:28:01,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:28:01,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:28:01,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:28:01,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:28:01,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:28:01,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:28:01,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:28:01,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:28:01,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:28:01,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:28:01,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:28:01,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:28:01,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:28:01,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:28:01,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:28:01,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:28:01,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:28:01,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:28:01,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:28:01,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:28:01,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:28:01,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:28:01,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:28:01,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:28:01,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:28:01,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:28:01,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:28:01,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:28:01,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:28:01,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:28:01,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:28:01,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:28:01,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:28:01,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:28:01,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:28:01,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:28:01,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:28:01,646 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:28:01,646 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:28:01,646 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:28:01,646 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:28:01,646 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:28:01,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:28:01,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:28:01,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:28:01,647 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:28:01,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:28:01,647 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:28:01,648 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:28:01,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:28:01,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:28:01,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:28:01,650 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:28:01,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:28:01,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:28:01,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:28:01,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:28:01,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:28:01,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:28:01,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:28:01,651 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:28:01,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:28:01,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:28:01,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:28:01,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:28:01,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:28:01,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:28:01,653 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_bb8557ed-af48-4c2a-aee8-8fa8675d5366/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2022-11-25 22:28:01,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:28:02,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:28:02,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:28:02,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:28:02,028 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:28:02,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-11-25 22:28:05,116 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:28:05,305 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:28:05,306 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-11-25 22:28:05,311 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/data/609973d0d/3d363f02d84f498bbf12ccb1b13cbbca/FLAG9be9c40ae [2022-11-25 22:28:05,325 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/data/609973d0d/3d363f02d84f498bbf12ccb1b13cbbca [2022-11-25 22:28:05,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:28:05,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:28:05,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:28:05,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:28:05,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:28:05,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22231c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05, skipping insertion in model container [2022-11-25 22:28:05,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:28:05,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:28:05,512 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_bb8557ed-af48-4c2a-aee8-8fa8675d5366/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-11-25 22:28:05,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:28:05,540 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:28:05,554 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_bb8557ed-af48-4c2a-aee8-8fa8675d5366/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-11-25 22:28:05,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:28:05,575 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:28:05,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05 WrapperNode [2022-11-25 22:28:05,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:28:05,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:28:05,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:28:05,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:28:05,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,608 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-25 22:28:05,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:28:05,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:28:05,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:28:05,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:28:05,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:28:05,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:28:05,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:28:05,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:28:05,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (1/1) ... [2022-11-25 22:28:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:28:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:05,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:28:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:28:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:28:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:28:05,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:28:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:28:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:28:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:28:05,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:28:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:28:05,777 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:28:05,779 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:28:05,945 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:28:05,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:28:05,983 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:28:05,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:28:05 BoogieIcfgContainer [2022-11-25 22:28:05,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:28:05,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:28:05,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:28:05,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:28:05,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:28:05" (1/3) ... [2022-11-25 22:28:05,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0fafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:28:05, skipping insertion in model container [2022-11-25 22:28:05,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:05" (2/3) ... [2022-11-25 22:28:05,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0fafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:28:05, skipping insertion in model container [2022-11-25 22:28:05,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:28:05" (3/3) ... [2022-11-25 22:28:06,000 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2022-11-25 22:28:06,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:28:06,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:28:06,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:28:06,086 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;@141c3b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:28:06,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:28:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:28:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 22:28:06,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:06,100 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:06,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2022-11-25 22:28:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216499720] [2022-11-25 22:28:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:06,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216499720] [2022-11-25 22:28:06,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 22:28:06,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40037449] [2022-11-25 22:28:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:06,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:06,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:28:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 22:28:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:06,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:06,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40037449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:06,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:06,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:28:06,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40279951] [2022-11-25 22:28:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:28:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:28:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:28:06,487 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:06,562 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-25 22:28:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:28:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-25 22:28:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:06,574 INFO L225 Difference]: With dead ends: 35 [2022-11-25 22:28:06,574 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 22:28:06,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 22:28:06,597 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:06,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 22:28:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-25 22:28:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:28:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-25 22:28:06,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2022-11-25 22:28:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:06,632 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-25 22:28:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-25 22:28:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:28:06,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:06,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:06,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 22:28:06,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2022-11-25 22:28:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364164226] [2022-11-25 22:28:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:06,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364164226] [2022-11-25 22:28:06,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 22:28:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587258112] [2022-11-25 22:28:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:06,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:06,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:06,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:06,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:28:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:28:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:07,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:07,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587258112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:07,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:07,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263448240] [2022-11-25 22:28:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:07,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:07,050 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:07,085 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-25 22:28:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-25 22:28:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:07,087 INFO L225 Difference]: With dead ends: 33 [2022-11-25 22:28:07,088 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 22:28:07,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 22:28:07,090 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:07,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 22:28:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-25 22:28:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:28:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-25 22:28:07,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-25 22:28:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:07,099 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-25 22:28:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-25 22:28:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:28:07,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:07,101 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:07,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:28:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:07,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2022-11-25 22:28:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179570530] [2022-11-25 22:28:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:07,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:07,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:07,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814030520] [2022-11-25 22:28:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:07,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:07,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:28:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 22:28:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:07,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:07,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179570530] [2022-11-25 22:28:07,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814030520] [2022-11-25 22:28:07,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814030520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:07,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:07,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 22:28:07,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668028639] [2022-11-25 22:28:07,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:28:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:28:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:28:07,882 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:28:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:08,122 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-25 22:28:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:28:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-25 22:28:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:08,127 INFO L225 Difference]: With dead ends: 34 [2022-11-25 22:28:08,127 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 22:28:08,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:28:08,132 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:08,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 22:28:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 22:28:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:28:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-25 22:28:08,153 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-11-25 22:28:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:08,154 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-25 22:28:08,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:28:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-25 22:28:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:28:08,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:08,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:08,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:08,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2022-11-25 22:28:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:08,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941192562] [2022-11-25 22:28:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:08,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:08,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319724485] [2022-11-25 22:28:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:08,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:08,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:08,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:08,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:28:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:28:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:08,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:08,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:08,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941192562] [2022-11-25 22:28:08,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319724485] [2022-11-25 22:28:08,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319724485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755113069] [2022-11-25 22:28:08,566 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 22:28:08,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:08,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:08,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:08,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:09,029 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-11-25 22:28:09,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:09,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:10,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '538#(and (<= 2 ~counter~0) (< ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:10,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:10,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:10,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 22:28:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810039271] [2022-11-25 22:28:10,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:28:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:28:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:28:10,233 INFO L87 Difference]: Start difference. First operand 31 states and 37 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:28:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:10,345 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-25 22:28:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:28:10,346 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-25 22:28:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:10,347 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:28:10,347 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 22:28:10,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:28:10,349 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:10,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 95 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 22:28:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-25 22:28:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:28:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-25 22:28:10,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2022-11-25 22:28:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:10,359 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-25 22:28:10,360 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:28:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-25 22:28:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:28:10,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:10,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:10,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 22:28:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:10,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2022-11-25 22:28:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:10,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710049983] [2022-11-25 22:28:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:10,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:10,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21610095] [2022-11-25 22:28:10,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:10,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:10,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:28:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:28:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:28:10,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:11,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710049983] [2022-11-25 22:28:11,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21610095] [2022-11-25 22:28:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21610095] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:11,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:11,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-25 22:28:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423926456] [2022-11-25 22:28:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:28:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:28:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:28:11,085 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:14,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 22:28:16,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 22:28:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:16,678 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-11-25 22:28:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:28:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-25 22:28:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:16,681 INFO L225 Difference]: With dead ends: 50 [2022-11-25 22:28:16,681 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 22:28:16,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:28:16,682 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:16,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 22:28:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 22:28:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-25 22:28:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:28:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-25 22:28:16,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-11-25 22:28:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:16,706 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-25 22:28:16,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:28:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-25 22:28:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:28:16,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:16,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:16,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:16,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:16,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:16,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1946272323, now seen corresponding path program 1 times [2022-11-25 22:28:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:16,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505291097] [2022-11-25 22:28:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:16,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351378719] [2022-11-25 22:28:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:16,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:16,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:16,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:28:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:28:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:17,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505291097] [2022-11-25 22:28:17,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:17,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351378719] [2022-11-25 22:28:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351378719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:17,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130937538] [2022-11-25 22:28:17,115 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 22:28:17,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:17,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:17,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:17,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:17,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 22:28:17,403 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:17,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:18,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1081#(and (<= 6 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:18,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:18,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:18,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-11-25 22:28:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992084897] [2022-11-25 22:28:18,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:28:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:28:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:28:18,629 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:28:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:18,777 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-11-25 22:28:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:28:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-25 22:28:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:18,781 INFO L225 Difference]: With dead ends: 95 [2022-11-25 22:28:18,781 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 22:28:18,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:28:18,783 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:18,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 111 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 22:28:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-11-25 22:28:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 68 states have internal predecessors, (76), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:28:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-11-25 22:28:18,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 20 [2022-11-25 22:28:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:18,807 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-11-25 22:28:18,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:28:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-11-25 22:28:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:28:18,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:18,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:18,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:19,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1825805005, now seen corresponding path program 1 times [2022-11-25 22:28:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877594274] [2022-11-25 22:28:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:19,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127069336] [2022-11-25 22:28:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:19,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:28:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:28:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:19,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:19,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877594274] [2022-11-25 22:28:19,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127069336] [2022-11-25 22:28:19,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127069336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:19,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:19,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151489352] [2022-11-25 22:28:19,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:28:19,136 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:28:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:19,193 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-11-25 22:28:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-25 22:28:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:19,196 INFO L225 Difference]: With dead ends: 111 [2022-11-25 22:28:19,196 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 22:28:19,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:28:19,200 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:19,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 22:28:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-25 22:28:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 57 states have internal predecessors, (65), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:28:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-11-25 22:28:19,235 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 25 [2022-11-25 22:28:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:19,236 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-11-25 22:28:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:28:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-11-25 22:28:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 22:28:19,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:19,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:19,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:28:19,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -687200305, now seen corresponding path program 1 times [2022-11-25 22:28:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206962223] [2022-11-25 22:28:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:19,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:19,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663159236] [2022-11-25 22:28:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:19,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:19,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:28:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:28:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:28:19,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:28:19,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206962223] [2022-11-25 22:28:19,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663159236] [2022-11-25 22:28:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663159236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702775512] [2022-11-25 22:28:19,708 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-25 22:28:19,708 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:19,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:19,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:19,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:20,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-25 22:28:20,143 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:20,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:21,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1839#(and (<= 2 ~counter~0) (< ~counter~0 6) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:21,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:21,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:21,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-25 22:28:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983968876] [2022-11-25 22:28:21,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:28:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:28:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:28:21,585 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:28:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:21,774 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-11-25 22:28:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:28:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-25 22:28:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:21,776 INFO L225 Difference]: With dead ends: 81 [2022-11-25 22:28:21,776 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 22:28:21,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:28:21,777 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:21,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 22:28:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-25 22:28:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 54 states have internal predecessors, (60), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:28:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-11-25 22:28:21,800 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 26 [2022-11-25 22:28:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:21,801 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-11-25 22:28:21,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:28:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-11-25 22:28:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:28:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:21,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:21,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:22,010 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -810539866, now seen corresponding path program 1 times [2022-11-25 22:28:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:22,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346393229] [2022-11-25 22:28:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:22,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:22,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687297383] [2022-11-25 22:28:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:22,025 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:22,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:28:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:28:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:22,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 3 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:25,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346393229] [2022-11-25 22:28:25,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687297383] [2022-11-25 22:28:25,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687297383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687101028] [2022-11-25 22:28:25,155 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-25 22:28:25,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:25,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:25,156 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:25,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:26,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-25 22:28:26,294 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:26,321 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:27,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2239#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:27,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:27,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 22:28:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999432969] [2022-11-25 22:28:27,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 22:28:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 22:28:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=664, Unknown=1, NotChecked=0, Total=756 [2022-11-25 22:28:27,606 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:28:32,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:32,781 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-11-25 22:28:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:28:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-25 22:28:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:32,782 INFO L225 Difference]: With dead ends: 82 [2022-11-25 22:28:32,783 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 22:28:32,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=98, Invalid=713, Unknown=1, NotChecked=0, Total=812 [2022-11-25 22:28:32,784 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:32,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-25 22:28:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 22:28:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-11-25 22:28:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:28:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-25 22:28:32,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 28 [2022-11-25 22:28:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:32,798 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-25 22:28:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:28:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-25 22:28:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 22:28:32,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:32,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:32,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 22:28:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:33,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1487974853, now seen corresponding path program 2 times [2022-11-25 22:28:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120290072] [2022-11-25 22:28:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:33,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:33,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148590187] [2022-11-25 22:28:33,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:33,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:33,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:33,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:33,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:28:33,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:28:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:28:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:34,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:35,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120290072] [2022-11-25 22:28:35,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148590187] [2022-11-25 22:28:35,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148590187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008330446] [2022-11-25 22:28:35,176 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-25 22:28:35,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:35,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:35,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:35,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:36,187 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-25 22:28:36,210 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:36,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:37,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2683#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:37,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:37,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:37,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-25 22:28:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090863069] [2022-11-25 22:28:37,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:37,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:28:37,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:37,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:28:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:28:37,519 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:28:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:38,602 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-25 22:28:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:28:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2022-11-25 22:28:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:38,603 INFO L225 Difference]: With dead ends: 75 [2022-11-25 22:28:38,603 INFO L226 Difference]: Without dead ends: 46 [2022-11-25 22:28:38,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:28:38,604 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:38,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 87 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 22:28:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-25 22:28:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-25 22:28:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:28:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-25 22:28:38,614 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2022-11-25 22:28:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:38,614 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-25 22:28:38,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:28:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-25 22:28:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:28:38,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:38,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:38,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:38,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1370364814, now seen corresponding path program 3 times [2022-11-25 22:28:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059846293] [2022-11-25 22:28:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:38,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:38,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558051460] [2022-11-25 22:28:38,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:38,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:38,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:38,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:28:38,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:28:38,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:28:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:28:38,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:39,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059846293] [2022-11-25 22:28:39,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558051460] [2022-11-25 22:28:39,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558051460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385007791] [2022-11-25 22:28:39,093 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-25 22:28:39,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:39,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:39,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:39,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:40,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-25 22:28:40,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:28:40,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:41,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3104#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:41,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:41,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:41,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-25 22:28:41,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969911274] [2022-11-25 22:28:41,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:28:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:28:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:28:41,091 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:28:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:41,176 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2022-11-25 22:28:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:28:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2022-11-25 22:28:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:41,180 INFO L225 Difference]: With dead ends: 83 [2022-11-25 22:28:41,180 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 22:28:41,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:28:41,181 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:41,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 22:28:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-25 22:28:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.0) internal successors, (29), 29 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:28:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-11-25 22:28:41,190 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 39 [2022-11-25 22:28:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:41,190 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-11-25 22:28:41,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:28:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-11-25 22:28:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:28:41,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:41,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:41,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:28:41,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1372152274, now seen corresponding path program 1 times [2022-11-25 22:28:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361937943] [2022-11-25 22:28:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:41,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:41,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478181912] [2022-11-25 22:28:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:41,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:41,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:28:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 22:28:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:05,553 WARN L233 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 105 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:29:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:44,042 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:37,146 WARN L233 SmtUtils]: Spent 13.29s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:16,825 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:48,747 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse6 (mod .cse5 2147483648))) (let ((.cse0 (* .cse6 2)) (.cse3 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse7 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse0) (let ((.cse1 (* 4 (* .cse6 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse2 (* (div (+ (* (- 2) .cse5) .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0) 4294967296) 4294967296)) (.cse4 (* 2 .cse5))) (and (< (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0) (+ .cse2 .cse3 .cse4 1)) (< (+ .cse2 .cse3 .cse4) (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0 1))))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse7)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse3)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse7)) (<= (* .cse5 4) .cse7))))) is different from true [2022-11-25 22:32:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2022-11-25 22:32:36,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:36,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361937943] [2022-11-25 22:32:36,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:32:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478181912] [2022-11-25 22:32:36,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478181912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:32:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56900076] [2022-11-25 22:32:36,823 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-25 22:32:36,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:36,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:36,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:37,629 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-25 22:32:37,692 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-25 22:32:37,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:02,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3542#(and (<= 2 ~counter~0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:02,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:02,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:02,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-25 22:33:02,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704549661] [2022-11-25 22:33:02,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:33:02,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:33:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1311, Unknown=11, NotChecked=74, Total=1560 [2022-11-25 22:33:02,765 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:33:05,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:07,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:10,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:13,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:15,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:17,531 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (= |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~b~0#1|) (< .cse0 2147483647) (<= 1 .cse0) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse7 (mod .cse6 2147483648))) (let ((.cse1 (* .cse7 2)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse8 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 .cse1) (let ((.cse2 (* 4 (* .cse7 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse3 (* (div (+ (* (- 2) .cse6) .cse2 |c_ULTIMATE.start_main_~r~0#1| .cse1) 4294967296) 4294967296)) (.cse5 (* 2 .cse6))) (and (< (+ .cse2 |c_ULTIMATE.start_main_~r~0#1| .cse1) (+ .cse3 .cse4 .cse5 1)) (< (+ .cse3 .cse4 .cse5) (+ .cse2 |c_ULTIMATE.start_main_~r~0#1| .cse1 1))))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse8)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse4)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse8)) (<= (* .cse6 4) .cse8))))) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|))) is different from true [2022-11-25 22:33:19,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:21,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:32,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:33:34,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:17,348 WARN L233 SmtUtils]: Spent 35.50s on a formula simplification. DAG size of input: 76 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:19,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:21,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:23,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:25,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:27,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:29,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 22:34:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:30,054 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-11-25 22:34:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:34:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-11-25 22:34:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:30,055 INFO L225 Difference]: With dead ends: 38 [2022-11-25 22:34:30,055 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 22:34:30,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 154.4s TimeCoverageRelationStatistics Valid=183, Invalid=1449, Unknown=16, NotChecked=158, Total=1806 [2022-11-25 22:34:30,056 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 11 Unknown, 53 Unchecked, 37.9s Time] [2022-11-25 22:34:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 22:34:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 22:34:30,057 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 22:34:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 22:34:30,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2022-11-25 22:34:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:30,058 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 22:34:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:34:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 22:34:30,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 22:34:30,061 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 22:34:30,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:30,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:34:30,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 22:35:49,613 WARN L233 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 141 DAG size of output: 124 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:35:57,498 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 99 DAG size of output: 42 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:35:57,536 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 22:35:57,536 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-11-25 22:35:57,536 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0) (< (mod |ULTIMATE.start_main_~B~0#1| 4294967296) 2147483647)) [2022-11-25 22:35:57,536 INFO L902 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: true [2022-11-25 22:35:57,536 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2022-11-25 22:35:57,536 INFO L895 garLoopResultBuilder]: At program point L40-2(lines 40 49) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (and (<= 1 .cse0) (< .cse0 2147483647) (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)))) [2022-11-25 22:35:57,537 INFO L899 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2022-11-25 22:35:57,537 INFO L895 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse5 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse0 (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (.cse1 (<= 1 .cse5)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (< .cse5 2147483647))) (or (and (<= 2 ~counter~0) .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4))) (and .cse0 (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse1 (<= ~counter~0 1) (<= 1 ~counter~0) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0) (<= 3 ~counter~0)) (and (<= 0 ~counter~0) (<= ~counter~0 0) .cse2 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) .cse3 .cse4)))) [2022-11-25 22:35:57,537 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-11-25 22:35:57,537 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 22:35:57,538 INFO L895 garLoopResultBuilder]: At program point L45-2(lines 26 52) the Hoare annotation is: (let ((.cse5 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse0 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse12 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse24 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse20 (mod |ULTIMATE.start_main_~B~0#1| 2147483648)) (.cse13 (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) .cse24)) (.cse23 (<= 4 ~counter~0)) (.cse17 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse2 (<= 1 .cse12)) (.cse1 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse18 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse19 (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse21 (exists ((|aux_div_v_ULTIMATE.start_main_~b~0#1_44_50| Int)) (<= (mod (+ (* |aux_div_v_ULTIMATE.start_main_~b~0#1_44_50| 2147483648) |ULTIMATE.start_main_~b~0#1|) 4294967296) .cse0))) (.cse8 (<= 5 ~counter~0)) (.cse14 (not (<= .cse5 .cse24))) (.cse15 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse16 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse7 (< .cse12 2147483647))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= (+ .cse0 (* (div |ULTIMATE.start_main_~b~0#1| 1073741824) 4294967296) 1) (* |ULTIMATE.start_main_~b~0#1| 4)) (<= (+ 1073741824 (* 1073741824 (div (+ (- 1) (- .cse0) .cse1) 2147483648))) |ULTIMATE.start_main_~b~0#1|) .cse2 (let ((.cse6 (mod |ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse4 (* 2 .cse6)) (.cse3 (<= .cse5 (mod (+ (* 4294967294 .cse6) |ULTIMATE.start_main_~A~0#1|) 4294967296)))) (or (and (= 2 |ULTIMATE.start_main_~q~0#1|) (not .cse3) (= (+ .cse4 |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and (= 3 |ULTIMATE.start_main_~q~0#1|) (= (+ .cse4 |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse3)))) (< |ULTIMATE.start_main_~b~0#1| 2147483648) .cse7 .cse8 (or (let ((.cse11 (* 2 (* |ULTIMATE.start_main_~q~0#1| (div .cse5 2))))) (let ((.cse9 (+ .cse11 |ULTIMATE.start_main_~r~0#1|))) (let ((.cse10 (* (div .cse9 4294967296) 4294967296))) (and (< .cse9 (+ .cse10 .cse0 1)) (< (+ .cse10 .cse0) (+ .cse11 |ULTIMATE.start_main_~r~0#1| 1)))))) (= .cse5 .cse12)) (= .cse0 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (and .cse13 .cse14 .cse15 .cse16 .cse7 (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4)) .cse17 (<= 3 ~counter~0)) (and .cse13 (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse2 .cse15 .cse16 .cse7 (<= ~counter~0 2)) (and .cse2 (< ~counter~0 4) .cse18 .cse19 (= |ULTIMATE.start_main_~b~0#1| .cse20) .cse7 .cse21) (let ((.cse22 (mod |ULTIMATE.start_main_~B~0#1| 1073741824))) (and (not (<= (* 4 .cse22) .cse0)) .cse18 .cse19 .cse7 .cse23 (= (* 2 .cse22) |ULTIMATE.start_main_~b~0#1|) (<= (* 2 .cse20) .cse0))) (and .cse13 .cse2 .cse15 .cse16 .cse7 .cse23 .cse17) (and .cse2 (<= 0 .cse1) (< .cse1 4294967296) .cse18 .cse19 .cse7 .cse21 .cse8) (and .cse14 (<= ~counter~0 1) .cse15 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse16 .cse7)))) [2022-11-25 22:35:57,538 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse15 (mod |ULTIMATE.start_main_~B~0#1| 2147483648)) (.cse14 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse8 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse6 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse0 (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) .cse8)) (.cse1 (<= 1 .cse14)) (.cse5 (<= 5 ~counter~0)) (.cse13 (* 2 .cse15)) (.cse11 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse12 (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse10 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (< .cse14 2147483647)) (.cse7 (mod |ULTIMATE.start_main_~b~0#1| 4294967296))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (not (<= .cse7 .cse8)) .cse2 .cse3 .cse4 (<= 4 ~counter~0) (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4)) .cse6) (and .cse0 (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse1 (< ~counter~0 4) .cse2 .cse3 .cse4) (let ((.cse9 (mod |ULTIMATE.start_main_~B~0#1| 1073741824))) (and (not (<= (* 4 .cse9) .cse10)) .cse11 .cse12 .cse4 .cse5 (= (* 2 .cse9) |ULTIMATE.start_main_~b~0#1|) (<= .cse13 .cse10))) (and (<= (+ .cse14 1) .cse13) .cse11 .cse12 (= |ULTIMATE.start_main_~b~0#1| .cse15) .cse4 (< ~counter~0 5) (exists ((|aux_div_v_ULTIMATE.start_main_~b~0#1_44_50| Int)) (<= (mod (+ (* |aux_div_v_ULTIMATE.start_main_~b~0#1_44_50| 2147483648) |ULTIMATE.start_main_~b~0#1|) 4294967296) .cse10))) (and .cse2 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse3 .cse4 (< .cse8 .cse7) (<= ~counter~0 2))))) [2022-11-25 22:35:57,538 INFO L899 garLoopResultBuilder]: For program point L41-1(lines 40 49) no Hoare annotation was computed. [2022-11-25 22:35:57,538 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-11-25 22:35:57,539 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2022-11-25 22:35:57,539 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2022-11-25 22:35:57,539 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-25 22:35:57,539 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-25 22:35:57,539 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-25 22:35:57,539 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-25 22:35:57,539 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-25 22:35:57,540 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-25 22:35:57,543 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:57,545 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 22:35:57,559 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,561 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,579 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,580 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 10:35:57 BoogieIcfgContainer [2022-11-25 22:35:57,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 22:35:57,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 22:35:57,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 22:35:57,599 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 22:35:57,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:28:05" (3/4) ... [2022-11-25 22:35:57,603 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 22:35:57,607 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-25 22:35:57,607 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 22:35:57,612 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-25 22:35:57,613 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-25 22:35:57,613 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 22:35:57,613 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 22:35:57,644 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((0 <= b && A % 4294967296 + b / 1073741824 * 4294967296 + 1 <= b * 4) && 1073741824 + 1073741824 * ((-1 + -(A % 4294967296) + 2 * b) / 2147483648) <= b) && 1 <= B % 4294967296) && (((2 == q && !(b % 4294967296 <= (4294967294 * (b % 1073741824) + A) % 4294967296)) && 2 * (b % 1073741824) + r == A) || ((3 == q && 2 * (b % 1073741824) + b + r == A) && b % 4294967296 <= (4294967294 * (b % 1073741824) + A) % 4294967296))) && b < 2147483648) && B % 4294967296 < 2147483647) && 5 <= counter) && ((2 * (q * (b % 4294967296 / 2)) + r < (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 + 1 && (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 < 2 * (q * (b % 4294967296 / 2)) + r + 1) || b % 4294967296 == B % 4294967296)) && A % 4294967296 == (r + b * q) % 4294967296) || (((((((b / 2 % 4294967296 <= r % 4294967296 && !(b % 4294967296 <= r % 4294967296)) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b == B * 4) && b % 2 == 0) && 3 <= counter)) || ((((((b / 2 % 4294967296 <= r % 4294967296 && b == 2 * B) && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && counter <= 2)) || ((((((1 <= B % 4294967296 && counter < 4) && q == 1) && b + r == A) && b == B % 2147483648) && B % 4294967296 < 2147483647) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 : int :: (aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 * 2147483648 + b) % 4294967296 <= A % 4294967296))) || ((((((!(4 * (B % 1073741824) <= A % 4294967296) && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && 4 <= counter) && 2 * (B % 1073741824) == b) && 2 * (B % 2147483648) <= A % 4294967296)) || ((((((b / 2 % 4294967296 <= r % 4294967296 && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && 4 <= counter) && b % 2 == 0)) || (((((((1 <= B % 4294967296 && 0 <= 2 * b) && 2 * b < 4294967296) && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 : int :: (aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 * 2147483648 + b) % 4294967296 <= A % 4294967296)) && 5 <= counter)) || (((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B % 4294967296 < 2147483647) [2022-11-25 22:35:57,655 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 22:35:57,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 22:35:57,657 INFO L158 Benchmark]: Toolchain (without parser) took 472326.71ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 94.3MB in the beginning and 160.1MB in the end (delta: -65.8MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,657 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 140.5MB. Free memory was 113.1MB in the beginning and 113.1MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 22:35:57,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.62ms. Allocated memory is still 140.5MB. Free memory was 94.3MB in the beginning and 83.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.41ms. Allocated memory is still 140.5MB. Free memory was 83.7MB in the beginning and 82.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 22:35:57,659 INFO L158 Benchmark]: Boogie Preprocessor took 21.99ms. Allocated memory is still 140.5MB. Free memory was 82.3MB in the beginning and 81.2MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,659 INFO L158 Benchmark]: RCFGBuilder took 354.16ms. Allocated memory is still 140.5MB. Free memory was 81.2MB in the beginning and 68.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,659 INFO L158 Benchmark]: TraceAbstraction took 471609.84ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 67.6MB in the beginning and 162.2MB in the end (delta: -94.6MB). Peak memory consumption was 87.3MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,660 INFO L158 Benchmark]: Witness Printer took 56.92ms. Allocated memory is still 213.9MB. Free memory was 162.2MB in the beginning and 160.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:35:57,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 140.5MB. Free memory was 113.1MB in the beginning and 113.1MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.62ms. Allocated memory is still 140.5MB. Free memory was 94.3MB in the beginning and 83.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.41ms. Allocated memory is still 140.5MB. Free memory was 83.7MB in the beginning and 82.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.99ms. Allocated memory is still 140.5MB. Free memory was 82.3MB in the beginning and 81.2MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 354.16ms. Allocated memory is still 140.5MB. Free memory was 81.2MB in the beginning and 68.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 471609.84ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 67.6MB in the beginning and 162.2MB in the end (delta: -94.6MB). Peak memory consumption was 87.3MB. Max. memory is 16.1GB. * Witness Printer took 56.92ms. Allocated memory is still 213.9MB. Free memory was 162.2MB in the beginning and 160.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] * 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: 21]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 471.5s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 100.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 87.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 192 SdHoareTripleChecker+Valid, 50.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 187 mSDsluCounter, 995 SdHoareTripleChecker+Invalid, 49.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 53 IncrementalHoareTripleChecker+Unchecked, 739 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 750 IncrementalHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 256 mSDtfsCounter, 750 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 731 GetRequests, 508 SyntacticMatches, 8 SemanticMatches, 215 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 165.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 41 PreInvPairs, 69 NumberOfFragments, 853 HoareAnnotationTreeSize, 41 FomulaSimplifications, 58 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2800 FormulaSimplificationTreeSizeReductionInter, 87.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 238.0s InterpolantComputationTime, 329 NumberOfCodeBlocks, 329 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 506 ConstructedInterpolants, 12 QuantifiedInterpolants, 6724 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1004 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 149/233 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: 26]: Loop Invariant [2022-11-25 22:35:57,689 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,689 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,691 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] [2022-11-25 22:35:57,691 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_44_50,QUANTIFIED] Derived loop invariant: (((((((((((((((0 <= b && A % 4294967296 + b / 1073741824 * 4294967296 + 1 <= b * 4) && 1073741824 + 1073741824 * ((-1 + -(A % 4294967296) + 2 * b) / 2147483648) <= b) && 1 <= B % 4294967296) && (((2 == q && !(b % 4294967296 <= (4294967294 * (b % 1073741824) + A) % 4294967296)) && 2 * (b % 1073741824) + r == A) || ((3 == q && 2 * (b % 1073741824) + b + r == A) && b % 4294967296 <= (4294967294 * (b % 1073741824) + A) % 4294967296))) && b < 2147483648) && B % 4294967296 < 2147483647) && 5 <= counter) && ((2 * (q * (b % 4294967296 / 2)) + r < (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 + 1 && (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 < 2 * (q * (b % 4294967296 / 2)) + r + 1) || b % 4294967296 == B % 4294967296)) && A % 4294967296 == (r + b * q) % 4294967296) || (((((((b / 2 % 4294967296 <= r % 4294967296 && !(b % 4294967296 <= r % 4294967296)) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b == B * 4) && b % 2 == 0) && 3 <= counter)) || ((((((b / 2 % 4294967296 <= r % 4294967296 && b == 2 * B) && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && counter <= 2)) || ((((((1 <= B % 4294967296 && counter < 4) && q == 1) && b + r == A) && b == B % 2147483648) && B % 4294967296 < 2147483647) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 : int :: (aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 * 2147483648 + b) % 4294967296 <= A % 4294967296))) || ((((((!(4 * (B % 1073741824) <= A % 4294967296) && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && 4 <= counter) && 2 * (B % 1073741824) == b) && 2 * (B % 2147483648) <= A % 4294967296)) || ((((((b / 2 % 4294967296 <= r % 4294967296 && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && 4 <= counter) && b % 2 == 0)) || (((((((1 <= B % 4294967296 && 0 <= 2 * b) && 2 * b < 4294967296) && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 : int :: (aux_div_v_ULTIMATE.start_main_~b~0#1_44_50 * 2147483648 + b) % 4294967296 <= A % 4294967296)) && 5 <= counter)) || (((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B % 4294967296 < 2147483647) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((2 <= counter && b / 2 % 4294967296 <= r % 4294967296) && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b == B * 4) || (((((((b / 2 % 4294967296 <= r % 4294967296 && b == 2 * B) && 1 <= B % 4294967296) && counter <= 1) && 1 <= counter) && q == 0) && A == r) && B % 4294967296 < 2147483647)) || ((((((b / 2 % 4294967296 <= r % 4294967296 && 1 <= B % 4294967296) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b % 2 == 0) && 3 <= counter)) || ((((((0 <= counter && counter <= 0) && q == 0) && B == b) && 1 <= b % 4294967296) && A == r) && B % 4294967296 < 2147483647) RESULT: Ultimate proved your program to be correct! [2022-11-25 22:35:57,907 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-25 22:35:57,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb8557ed-af48-4c2a-aee8-8fa8675d5366/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE