./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba --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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- 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-b5237d8 [2022-11-22 02:26:30,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:26:30,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:26:30,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:26:30,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:26:30,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:26:30,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:26:30,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:26:30,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:26:30,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:26:30,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:26:30,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:26:30,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:26:30,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:26:30,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:26:30,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:26:30,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:26:30,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:26:30,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:26:30,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:26:30,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:26:30,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:26:30,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:26:30,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:26:30,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:26:30,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:26:30,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:26:30,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:26:30,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:26:30,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:26:30,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:26:30,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:26:30,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:26:30,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:26:30,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:26:30,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:26:30,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:26:30,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:26:30,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:26:30,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:26:30,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:26:30,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:26:30,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:26:30,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:26:30,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:26:30,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:26:30,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:26:30,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:26:30,684 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:26:30,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:26:30,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:26:30,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:26:30,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:26:30,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:26:30,687 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:26:30,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:26:30,687 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:26:30,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:26:30,688 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:26:30,688 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:26:30,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:26:30,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:26:30,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:26:30,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:26:30,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:26:30,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:26:30,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:26:30,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:26:30,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:26:30,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:26:30,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:26:30,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:26:30,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:26:30,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:26:30,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:30,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:26:30,693 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:26:30,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:26:30,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:26:30,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:26:30,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:26:30,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:26:30,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:26:30,696 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_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2022-11-22 02:26:30,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:26:31,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:26:31,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:26:31,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:26:31,028 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:26:31,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-22 02:26:34,208 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:26:34,390 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:26:34,393 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-22 02:26:34,400 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/data/69b408e94/8f1d8ad8f4034de5b18f654c5114627a/FLAG2d4870f7c [2022-11-22 02:26:34,412 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/data/69b408e94/8f1d8ad8f4034de5b18f654c5114627a [2022-11-22 02:26:34,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:26:34,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:26:34,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:34,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:26:34,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:26:34,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7598f383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34, skipping insertion in model container [2022-11-22 02:26:34,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:26:34,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:26:34,567 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_fb4886a2-a9be-4764-8b02-63f6c3456d30/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-22 02:26:34,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:34,585 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:26:34,601 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_fb4886a2-a9be-4764-8b02-63f6c3456d30/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-22 02:26:34,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:34,616 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:26:34,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34 WrapperNode [2022-11-22 02:26:34,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:34,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:34,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:26:34,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:26:34,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,644 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-11-22 02:26:34,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:34,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:26:34,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:26:34,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:26:34,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:26:34,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:26:34,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:26:34,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:26:34,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (1/1) ... [2022-11-22 02:26:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:34,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:26:34,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:26:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:26:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:26:34,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:26:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:26:34,792 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:26:34,794 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:26:34,959 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:26:35,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:26:35,008 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 02:26:35,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:26:35 BoogieIcfgContainer [2022-11-22 02:26:35,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:26:35,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:26:35,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:26:35,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:26:35,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:26:34" (1/3) ... [2022-11-22 02:26:35,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bbd0e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:26:35, skipping insertion in model container [2022-11-22 02:26:35,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:34" (2/3) ... [2022-11-22 02:26:35,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bbd0e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:26:35, skipping insertion in model container [2022-11-22 02:26:35,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:26:35" (3/3) ... [2022-11-22 02:26:35,020 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-11-22 02:26:35,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:26:35,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:26:35,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:26:35,094 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;@319dc43c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:26:35,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:26:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-11-22 02:26:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:26:35,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:35,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:35,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash 879794961, now seen corresponding path program 1 times [2022-11-22 02:26:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209620463] [2022-11-22 02:26:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:35,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209620463] [2022-11-22 02:26:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209620463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:35,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:35,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:26:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569579210] [2022-11-22 02:26:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:35,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:35,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:26:35,578 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:26:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:35,689 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-22 02:26:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:26:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2022-11-22 02:26:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:35,700 INFO L225 Difference]: With dead ends: 24 [2022-11-22 02:26:35,700 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 02:26:35,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:26:35,710 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:35,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 02:26:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-22 02:26:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-11-22 02:26:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-22 02:26:35,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-11-22 02:26:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:35,781 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-22 02:26:35,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:26:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-22 02:26:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:26:35,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:35,782 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:26:35,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2085127801, now seen corresponding path program 1 times [2022-11-22 02:26:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857117090] [2022-11-22 02:26:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:26:36,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:36,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857117090] [2022-11-22 02:26:36,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857117090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:36,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:36,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:36,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860336070] [2022-11-22 02:26:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:26:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:26:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:36,286 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-11-22 02:26:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:36,375 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2022-11-22 02:26:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:26:36,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) Word has length 11 [2022-11-22 02:26:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:36,377 INFO L225 Difference]: With dead ends: 23 [2022-11-22 02:26:36,377 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 02:26:36,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:36,379 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:36,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 02:26:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-22 02:26:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2022-11-22 02:26:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-11-22 02:26:36,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2022-11-22 02:26:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:36,389 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-11-22 02:26:36,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-11-22 02:26:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-11-22 02:26:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:26:36,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:36,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:36,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:26:36,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1421280196, now seen corresponding path program 1 times [2022-11-22 02:26:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:36,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065739762] [2022-11-22 02:26:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:26:36,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065739762] [2022-11-22 02:26:36,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065739762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071825841] [2022-11-22 02:26:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:36,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:36,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:36,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:36,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:26:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:26:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:26:36,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:26:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071825841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:36,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:26:36,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-22 02:26:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650660847] [2022-11-22 02:26:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:36,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:26:36,833 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-11-22 02:26:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:36,940 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-22 02:26:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:26:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 13 [2022-11-22 02:26:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:36,942 INFO L225 Difference]: With dead ends: 48 [2022-11-22 02:26:36,942 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:26:36,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:26:36,948 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:36,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:26:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-22 02:26:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2022-11-22 02:26:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-22 02:26:36,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-22 02:26:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:36,973 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-22 02:26:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-11-22 02:26:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-22 02:26:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:26:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:36,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:36,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:37,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:37,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1913796903, now seen corresponding path program 1 times [2022-11-22 02:26:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:37,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610897804] [2022-11-22 02:26:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:26:37,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610897804] [2022-11-22 02:26:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610897804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128227532] [2022-11-22 02:26:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:37,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:37,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:26:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:26:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:26:37,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:26:37,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128227532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:37,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:26:37,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-22 02:26:37,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359623226] [2022-11-22 02:26:37,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:26:37,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:26:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:26:37,552 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-22 02:26:37,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:37,675 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2022-11-22 02:26:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:26:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 15 [2022-11-22 02:26:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:37,679 INFO L225 Difference]: With dead ends: 56 [2022-11-22 02:26:37,679 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:26:37,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:26:37,683 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 70 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:37,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:37,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:26:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-11-22 02:26:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2022-11-22 02:26:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-22 02:26:37,705 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2022-11-22 02:26:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:37,706 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-22 02:26:37,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-22 02:26:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-22 02:26:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 02:26:37,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:37,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:37,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:37,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:37,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1798734434, now seen corresponding path program 1 times [2022-11-22 02:26:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346571085] [2022-11-22 02:26:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:26:38,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:38,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346571085] [2022-11-22 02:26:38,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346571085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538526227] [2022-11-22 02:26:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:38,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:38,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:38,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:26:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:26:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:26:38,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:26:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538526227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:38,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:26:38,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-22 02:26:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233268623] [2022-11-22 02:26:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:26:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:26:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:26:38,267 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-22 02:26:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:38,369 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-22 02:26:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:26:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) Word has length 17 [2022-11-22 02:26:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:38,373 INFO L225 Difference]: With dead ends: 58 [2022-11-22 02:26:38,373 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:26:38,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:26:38,375 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:38,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:26:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-22 02:26:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-11-22 02:26:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-22 02:26:38,393 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2022-11-22 02:26:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:38,394 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-22 02:26:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-22 02:26:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-22 02:26:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:26:38,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:38,396 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:38,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:38,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1475056415, now seen corresponding path program 1 times [2022-11-22 02:26:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:38,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050119199] [2022-11-22 02:26:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:26:38,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050119199] [2022-11-22 02:26:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050119199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387665349] [2022-11-22 02:26:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:38,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:38,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:38,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:38,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:26:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:26:39,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:26:39,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:26:39,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387665349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:39,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329692984] [2022-11-22 02:26:39,282 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:26:39,282 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:39,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:39,296 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:39,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:41,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:42,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:26:42,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:42,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:42,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-22 02:26:42,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420329096] [2022-11-22 02:26:42,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:42,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:26:42,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:26:42,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:26:42,426 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2022-11-22 02:26:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:44,447 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-11-22 02:26:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 02:26:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) Word has length 22 [2022-11-22 02:26:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:44,450 INFO L225 Difference]: With dead ends: 134 [2022-11-22 02:26:44,450 INFO L226 Difference]: Without dead ends: 90 [2022-11-22 02:26:44,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=472, Invalid=1978, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:26:44,452 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 394 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:44,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 5 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:26:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-22 02:26:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2022-11-22 02:26:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 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) [2022-11-22 02:26:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2022-11-22 02:26:44,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2022-11-22 02:26:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:44,477 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2022-11-22 02:26:44,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2022-11-22 02:26:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2022-11-22 02:26:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:26:44,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:44,479 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 02:26:44,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:44,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:26:44,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 868760348, now seen corresponding path program 2 times [2022-11-22 02:26:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:44,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426148295] [2022-11-22 02:26:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:44,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 02:26:45,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426148295] [2022-11-22 02:26:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426148295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502463033] [2022-11-22 02:26:45,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:26:45,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:45,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:45,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:26:45,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 02:26:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:26:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:26:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 02:26:45,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:26:45,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502463033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:45,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:26:45,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-22 02:26:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862571682] [2022-11-22 02:26:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:45,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:26:45,261 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-22 02:26:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:45,344 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-11-22 02:26:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:26:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 40 [2022-11-22 02:26:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:45,346 INFO L225 Difference]: With dead ends: 97 [2022-11-22 02:26:45,346 INFO L226 Difference]: Without dead ends: 95 [2022-11-22 02:26:45,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:26:45,347 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:45,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-22 02:26:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-11-22 02:26:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 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) [2022-11-22 02:26:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-11-22 02:26:45,374 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2022-11-22 02:26:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:45,375 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-11-22 02:26:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-22 02:26:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-11-22 02:26:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:26:45,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:45,376 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-22 02:26:45,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:45,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -208931846, now seen corresponding path program 3 times [2022-11-22 02:26:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127487755] [2022-11-22 02:26:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-22 02:26:45,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127487755] [2022-11-22 02:26:45,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127487755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:45,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731716632] [2022-11-22 02:26:45,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:26:45,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:45,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:46,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:46,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:26:46,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:26:46,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:26:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:26:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 02:26:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 02:26:46,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731716632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009757305] [2022-11-22 02:26:46,405 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:26:46,405 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:46,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:46,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:46,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:47,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:48,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:48,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:48,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-11-22 02:26:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100350329] [2022-11-22 02:26:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:48,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:26:48,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:26:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:26:48,528 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-11-22 02:26:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:49,156 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2022-11-22 02:26:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:26:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) Word has length 50 [2022-11-22 02:26:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:49,158 INFO L225 Difference]: With dead ends: 223 [2022-11-22 02:26:49,158 INFO L226 Difference]: Without dead ends: 122 [2022-11-22 02:26:49,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:26:49,160 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:49,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 10 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:26:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-22 02:26:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-11-22 02:26:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 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) [2022-11-22 02:26:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-11-22 02:26:49,194 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 50 [2022-11-22 02:26:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:49,194 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-11-22 02:26:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-11-22 02:26:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-11-22 02:26:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:26:49,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:49,205 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-22 02:26:49,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:49,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1423124666, now seen corresponding path program 4 times [2022-11-22 02:26:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716581001] [2022-11-22 02:26:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 15 proven. 209 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-11-22 02:26:50,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716581001] [2022-11-22 02:26:50,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716581001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958650572] [2022-11-22 02:26:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:26:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:50,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:50,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:50,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:26:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:26:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 262 proven. 87 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-22 02:26:50,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 260 proven. 89 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-22 02:26:50,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958650572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:50,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760878699] [2022-11-22 02:26:50,602 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:26:50,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:50,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:50,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:50,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:51,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:52,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2931#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:52,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:52,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-22 02:26:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610263051] [2022-11-22 02:26:52,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:52,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:26:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:26:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:26:52,803 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-11-22 02:26:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:59,973 INFO L93 Difference]: Finished difference Result 644 states and 814 transitions. [2022-11-22 02:26:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-22 02:26:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) Word has length 74 [2022-11-22 02:26:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:59,987 INFO L225 Difference]: With dead ends: 644 [2022-11-22 02:26:59,987 INFO L226 Difference]: Without dead ends: 537 [2022-11-22 02:26:59,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1149, Invalid=6507, Unknown=0, NotChecked=0, Total=7656 [2022-11-22 02:26:59,997 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 684 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:59,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 13 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:26:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-22 02:27:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 335. [2022-11-22 02:27:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.122754491017964) internal successors, (375), 334 states have internal predecessors, (375), 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) [2022-11-22 02:27:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2022-11-22 02:27:00,118 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 74 [2022-11-22 02:27:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:00,119 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2022-11-22 02:27:00,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-11-22 02:27:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2022-11-22 02:27:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-22 02:27:00,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:00,123 INFO L195 NwaCegarLoop]: trace histogram [85, 84, 84, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-22 02:27:00,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:00,330 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash 32824799, now seen corresponding path program 5 times [2022-11-22 02:27:00,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:00,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176536825] [2022-11-22 02:27:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 60 proven. 1944 refuted. 0 times theorem prover too weak. 10363 trivial. 0 not checked. [2022-11-22 02:27:02,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176536825] [2022-11-22 02:27:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176536825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133155724] [2022-11-22 02:27:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:02,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:02,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:02,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:27:02,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 02:27:02,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 1668 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2022-11-22 02:27:03,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:03,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133155724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:03,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:27:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2022-11-22 02:27:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967885940] [2022-11-22 02:27:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:27:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:27:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:27:03,542 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-22 02:27:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:03,732 INFO L93 Difference]: Finished difference Result 603 states and 656 transitions. [2022-11-22 02:27:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:27:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 332 [2022-11-22 02:27:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:03,741 INFO L225 Difference]: With dead ends: 603 [2022-11-22 02:27:03,741 INFO L226 Difference]: Without dead ends: 601 [2022-11-22 02:27:03,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:27:03,743 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:03,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:27:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-22 02:27:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 354. [2022-11-22 02:27:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1189801699716715) internal successors, (395), 353 states have internal predecessors, (395), 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) [2022-11-22 02:27:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 395 transitions. [2022-11-22 02:27:03,825 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 395 transitions. Word has length 332 [2022-11-22 02:27:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:03,826 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 395 transitions. [2022-11-22 02:27:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-22 02:27:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 395 transitions. [2022-11-22 02:27:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-11-22 02:27:03,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:03,831 INFO L195 NwaCegarLoop]: trace histogram [91, 90, 90, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-22 02:27:03,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:04,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:27:04,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2045133972, now seen corresponding path program 6 times [2022-11-22 02:27:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:04,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193764283] [2022-11-22 02:27:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 61 proven. 2090 refuted. 0 times theorem prover too weak. 11985 trivial. 0 not checked. [2022-11-22 02:27:06,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:06,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193764283] [2022-11-22 02:27:06,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193764283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:06,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903577963] [2022-11-22 02:27:06,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:27:06,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:06,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:06,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:27:06,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:27:06,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 02:27:06,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9336 proven. 344 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-11-22 02:27:07,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9177 proven. 503 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-11-22 02:27:07,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903577963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704771208] [2022-11-22 02:27:07,923 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:27:07,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:07,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:07,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:07,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:09,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:10,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9056#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:10,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:10,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2022-11-22 02:27:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540448897] [2022-11-22 02:27:10,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:10,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 02:27:10,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 02:27:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:27:10,286 INFO L87 Difference]: Start difference. First operand 354 states and 395 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-11-22 02:27:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:12,595 INFO L93 Difference]: Finished difference Result 836 states and 969 transitions. [2022-11-22 02:27:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:27:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) Word has length 352 [2022-11-22 02:27:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:12,597 INFO L225 Difference]: With dead ends: 836 [2022-11-22 02:27:12,597 INFO L226 Difference]: Without dead ends: 448 [2022-11-22 02:27:12,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=381, Invalid=3159, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:27:12,600 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:12,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 21 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:27:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-22 02:27:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 420. [2022-11-22 02:27:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.100238663484487) internal successors, (461), 419 states have internal predecessors, (461), 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) [2022-11-22 02:27:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 461 transitions. [2022-11-22 02:27:12,729 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 461 transitions. Word has length 352 [2022-11-22 02:27:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:12,729 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 461 transitions. [2022-11-22 02:27:12,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-11-22 02:27:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 461 transitions. [2022-11-22 02:27:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-22 02:27:12,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:12,738 INFO L195 NwaCegarLoop]: trace histogram [113, 112, 112, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-22 02:27:12,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:27:12,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:27:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -723087710, now seen corresponding path program 7 times [2022-11-22 02:27:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966647258] [2022-11-22 02:27:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 61 proven. 2921 refuted. 0 times theorem prover too weak. 18117 trivial. 0 not checked. [2022-11-22 02:27:15,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:15,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966647258] [2022-11-22 02:27:15,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966647258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:15,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560968627] [2022-11-22 02:27:15,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:27:15,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:15,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:15,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:27:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 02:27:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10437 proven. 3365 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-11-22 02:27:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10435 proven. 3367 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-11-22 02:27:17,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560968627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808446257] [2022-11-22 02:27:17,894 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:27:17,894 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:17,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:17,895 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:17,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:19,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:20,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13480#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:20,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:20,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:20,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2022-11-22 02:27:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020537786] [2022-11-22 02:27:20,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 02:27:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 02:27:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:27:20,377 INFO L87 Difference]: Start difference. First operand 420 states and 461 transitions. Second operand has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-11-22 02:29:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:43,265 INFO L93 Difference]: Finished difference Result 2487 states and 2927 transitions. [2022-11-22 02:29:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-22 02:29:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) Word has length 418 [2022-11-22 02:29:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:43,272 INFO L225 Difference]: With dead ends: 2487 [2022-11-22 02:29:43,273 INFO L226 Difference]: Without dead ends: 2071 [2022-11-22 02:29:43,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 1218 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26571 ImplicationChecksByTransitivity, 135.1s TimeCoverageRelationStatistics Valid=6881, Invalid=62025, Unknown=0, NotChecked=0, Total=68906 [2022-11-22 02:29:43,285 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6936 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 6936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:43,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2159 Valid, 23 Invalid, 7382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 6936 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-22 02:29:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-22 02:29:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1290. [2022-11-22 02:29:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 1.0698215671062838) internal successors, (1379), 1289 states have internal predecessors, (1379), 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) [2022-11-22 02:29:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1379 transitions. [2022-11-22 02:29:43,583 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1379 transitions. Word has length 418 [2022-11-22 02:29:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:43,584 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1379 transitions. [2022-11-22 02:29:43,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-11-22 02:29:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1379 transitions. [2022-11-22 02:29:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2022-11-22 02:29:43,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:43,651 INFO L195 NwaCegarLoop]: trace histogram [371, 370, 370, 30, 29, 29, 28, 28, 27, 2, 1, 1, 1, 1] [2022-11-22 02:29:43,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 02:29:43,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:43,858 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1384058732, now seen corresponding path program 8 times [2022-11-22 02:29:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:43,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200776419] [2022-11-22 02:29:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 141 proven. 17494 refuted. 0 times theorem prover too weak. 202665 trivial. 0 not checked. [2022-11-22 02:29:53,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200776419] [2022-11-22 02:29:53,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200776419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498669203] [2022-11-22 02:29:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:29:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:53,953 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:53,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:29:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:29:54,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:29:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:29:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-11-22 02:29:59,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-11-22 02:30:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498669203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294983124] [2022-11-22 02:30:03,364 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:30:03,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:30:03,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:30:03,365 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:30:03,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:30:04,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:30:05,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27047#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:30:05,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:30:05,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:30:05,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 3, 3] total 24 [2022-11-22 02:30:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364154653] [2022-11-22 02:30:05,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:30:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:30:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:30:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:30:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:30:05,694 INFO L87 Difference]: Start difference. First operand 1290 states and 1379 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-11-22 02:30:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:15,346 INFO L93 Difference]: Finished difference Result 5992 states and 6845 transitions. [2022-11-22 02:30:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-22 02:30:15,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) Word has length 1288 [2022-11-22 02:30:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:15,362 INFO L225 Difference]: With dead ends: 5992 [2022-11-22 02:30:15,362 INFO L226 Difference]: Without dead ends: 4439 [2022-11-22 02:30:15,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3977 GetRequests, 3854 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1465, Invalid=14035, Unknown=0, NotChecked=0, Total=15500 [2022-11-22 02:30:15,368 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 688 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:15,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 8 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 02:30:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2022-11-22 02:30:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3978. [2022-11-22 02:30:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.0550666331405583) internal successors, (4196), 3977 states have internal predecessors, (4196), 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) [2022-11-22 02:30:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4196 transitions. [2022-11-22 02:30:16,549 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4196 transitions. Word has length 1288 [2022-11-22 02:30:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:16,549 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 4196 transitions. [2022-11-22 02:30:16,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-11-22 02:30:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4196 transitions. [2022-11-22 02:30:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3977 [2022-11-22 02:30:16,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:16,670 INFO L195 NwaCegarLoop]: trace histogram [1181, 1180, 1180, 72, 71, 71, 70, 70, 69, 5, 4, 1, 1, 1] [2022-11-22 02:30:16,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:16,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:30:16,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:30:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -194255029, now seen corresponding path program 9 times [2022-11-22 02:30:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:30:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966357086] [2022-11-22 02:30:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:30:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 357 proven. 63359 refuted. 0 times theorem prover too weak. 2134262 trivial. 0 not checked. [2022-11-22 02:31:01,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:31:01,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966357086] [2022-11-22 02:31:01,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966357086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:31:01,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511227360] [2022-11-22 02:31:01,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:31:01,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:31:01,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:31:01,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:31:01,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4886a2-a9be-4764-8b02-63f6c3456d30/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:31:03,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:31:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:31:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 6057 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-22 02:31:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1156213 proven. 30862 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-11-22 02:31:09,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1126806 proven. 60269 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-11-22 02:31:16,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511227360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039943341] [2022-11-22 02:31:16,996 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:31:16,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:31:16,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:31:16,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:31:16,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:31:18,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:31:37,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65301#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:31:37,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:31:37,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:31:37,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37, 37] total 92 [2022-11-22 02:31:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896118621] [2022-11-22 02:31:37,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:31:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-22 02:31:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:31:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-22 02:31:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=8775, Unknown=0, NotChecked=0, Total=9702 [2022-11-22 02:31:37,215 INFO L87 Difference]: Start difference. First operand 3978 states and 4196 transitions. Second operand has 92 states, 92 states have (on average 3.3152173913043477) internal successors, (305), 92 states have internal predecessors, (305), 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) [2022-11-22 02:32:29,121 WARN L233 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 96 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:06,033 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 95 DAG size of output: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:08,073 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ 6 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse1 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 10) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 11) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 1) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 12) 4294967296)) (.cse5 (mod (+ 7 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse7 (mod |c_ULTIMATE.start_main_~e~0#1| 4294967296)) (.cse4 (mod (+ 5 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse3 (mod (+ 2 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse14 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 8) 4294967296)) (.cse13 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 4) 4294967296)) (.cse12 (mod (+ 9 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse11 (mod (+ 3 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse9 (mod (+ 14 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse0 (mod (+ |c_ULTIMATE.start_main_~uint32_max~0#1| 4294967295) 4294967296)) (.cse15 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 13) 4294967296))) (and (< 16 .cse0) (< 15 .cse1) (< .cse2 .cse0) (< 15 .cse3) (< 15 .cse4) (<= 4294967295 |c_ULTIMATE.start_main_~uint32_max~0#1|) (< .cse5 .cse0) (< 15 .cse6) (< .cse7 .cse0) (< 15 .cse2) (< .cse8 .cse0) (< 15 .cse9) (< .cse1 .cse0) (< .cse10 .cse0) (< .cse11 .cse0) (< 15 .cse12) (< .cse6 .cse0) (< 15 .cse8) (< 15 .cse10) (< 15 .cse5) (< 15 .cse7) (< .cse4 .cse0) (< .cse13 .cse0) (< 15 .cse14) (<= (div (+ |c_ULTIMATE.start_main_~uint32_max~0#1| 4294967294) 4294967296) 1) (< 15 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 15) 4294967296)) (< .cse3 .cse0) (< .cse14 .cse0) (< 15 .cse13) (< .cse12 .cse0) (< 15 .cse11) (< .cse15 .cse0) (< .cse9 .cse0) (< 15 .cse15))) is different from false [2022-11-22 02:33:10,086 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ 6 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse1 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 10) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 11) 4294967296)) (.cse7 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 1) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 12) 4294967296)) (.cse5 (mod (+ 7 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse4 (mod (+ 5 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse3 (mod (+ 2 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse13 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 8) 4294967296)) (.cse12 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 4) 4294967296)) (.cse11 (mod (+ 9 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse10 (mod (+ 3 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse8 (mod (+ 14 |c_ULTIMATE.start_main_~e~0#1|) 4294967296)) (.cse0 (mod (+ |c_ULTIMATE.start_main_~uint32_max~0#1| 4294967295) 4294967296)) (.cse14 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 13) 4294967296))) (and (< 16 .cse0) (< 15 .cse1) (< .cse2 .cse0) (< 15 .cse3) (< 15 .cse4) (< .cse5 .cse0) (< 15 .cse6) (< 15 .cse2) (< .cse7 .cse0) (< 15 .cse8) (< .cse1 .cse0) (< .cse9 .cse0) (< .cse10 .cse0) (< 15 .cse11) (< .cse6 .cse0) (< 15 .cse7) (< 15 .cse9) (< 15 .cse5) (< .cse4 .cse0) (< .cse12 .cse0) (< 15 .cse13) (< 15 (mod (+ |c_ULTIMATE.start_main_~e~0#1| 15) 4294967296)) (< .cse3 .cse0) (< .cse13 .cse0) (< 15 .cse12) (< .cse11 .cse0) (< 15 .cse10) (< .cse14 .cse0) (< .cse8 .cse0) (< 15 .cse14))) is different from false [2022-11-22 02:33:40,594 WARN L233 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 82 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:34:07,140 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 77 DAG size of output: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:34:31,947 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 72 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)