./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS --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 a5dbdf40c5c8abdf745ea2973f48a7f1bd1d56b53cd410b7a2d364d83fc651a9 --- 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-8393723 [2022-11-19 06:44:11,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:44:11,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:44:11,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:44:11,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:44:11,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:44:11,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:44:11,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:44:11,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:44:11,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:44:11,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:44:11,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:44:11,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:44:11,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:44:11,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:44:11,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:44:11,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:44:11,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:44:11,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:44:11,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:44:11,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:44:11,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:44:11,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:44:11,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:44:11,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:44:11,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:44:11,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:44:11,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:44:11,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:44:11,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:44:11,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:44:11,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:44:11,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:44:11,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:44:11,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:44:11,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:44:11,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:44:11,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:44:11,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:44:11,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:44:11,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:44:11,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:44:11,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:44:11,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:44:11,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:44:11,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:44:11,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:44:11,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:44:11,610 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:44:11,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:44:11,611 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:44:11,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:44:11,611 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:44:11,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:44:11,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:44:11,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:44:11,612 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:44:11,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:44:11,613 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:44:11,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:44:11,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:44:11,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:44:11,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:44:11,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:44:11,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:44:11,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:44:11,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:44:11,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:44:11,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:44:11,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:44:11,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:44:11,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:44:11,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:44:11,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:44:11,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:44:11,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:44:11,620 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:44:11,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:44:11,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:44:11,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:44:11,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:44:11,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:44:11,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:44:11,622 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_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5dbdf40c5c8abdf745ea2973f48a7f1bd1d56b53cd410b7a2d364d83fc651a9 [2022-11-19 06:44:11,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:44:12,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:44:12,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:44:12,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:44:12,029 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:44:12,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loop-lit/gj2007b.i [2022-11-19 06:44:12,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/data/25aebabd8/e367fdc8beb8445090ebe6b6b29a08ee/FLAGcdd901c70 [2022-11-19 06:44:12,747 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:44:12,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/sv-benchmarks/c/loop-lit/gj2007b.i [2022-11-19 06:44:12,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/data/25aebabd8/e367fdc8beb8445090ebe6b6b29a08ee/FLAGcdd901c70 [2022-11-19 06:44:13,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/data/25aebabd8/e367fdc8beb8445090ebe6b6b29a08ee [2022-11-19 06:44:13,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:44:13,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:44:13,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:44:13,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:44:13,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:44:13,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a35820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13, skipping insertion in model container [2022-11-19 06:44:13,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:44:13,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:44:13,372 WARN L234 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_3a586f2a-5164-4562-9d35-8934b202fd5a/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2022-11-19 06:44:13,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:44:13,394 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:44:13,411 WARN L234 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_3a586f2a-5164-4562-9d35-8934b202fd5a/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2022-11-19 06:44:13,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:44:13,432 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:44:13,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13 WrapperNode [2022-11-19 06:44:13,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:44:13,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:44:13,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:44:13,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:44:13,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,474 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2022-11-19 06:44:13,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:44:13,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:44:13,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:44:13,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:44:13,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,497 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:44:13,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:44:13,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:44:13,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:44:13,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (1/1) ... [2022-11-19 06:44:13,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:44:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:13,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:44:13,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:44:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:44:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:44:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:44:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:44:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:44:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:44:13,661 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:44:13,664 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:44:13,795 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:44:13,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:44:13,833 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:44:13,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:13 BoogieIcfgContainer [2022-11-19 06:44:13,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:44:13,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:44:13,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:44:13,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:44:13,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:44:13" (1/3) ... [2022-11-19 06:44:13,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4cd770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:13, skipping insertion in model container [2022-11-19 06:44:13,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:13" (2/3) ... [2022-11-19 06:44:13,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4cd770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:13, skipping insertion in model container [2022-11-19 06:44:13,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:13" (3/3) ... [2022-11-19 06:44:13,849 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2022-11-19 06:44:13,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:44:13,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:44:13,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:44:13,940 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;@71a3027a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:44:13,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:44:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:44:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:44:13,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:13,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:44:13,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338691, now seen corresponding path program 1 times [2022-11-19 06:44:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:13,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441570583] [2022-11-19 06:44:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:14,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441570583] [2022-11-19 06:44:14,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441570583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:14,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:14,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:44:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239383541] [2022-11-19 06:44:14,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:14,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:44:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:44:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:44:14,376 INFO L87 Difference]: Start difference. First operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:14,487 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-19 06:44:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:44:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:44:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:14,512 INFO L225 Difference]: With dead ends: 30 [2022-11-19 06:44:14,513 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 06:44:14,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:14,523 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:14,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 06:44:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-19 06:44:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:44:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-19 06:44:14,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2022-11-19 06:44:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:14,574 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-19 06:44:14,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-19 06:44:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:44:14,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:14,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:44:14,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash -736059133, now seen corresponding path program 1 times [2022-11-19 06:44:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:14,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976474713] [2022-11-19 06:44:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:14,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976474713] [2022-11-19 06:44:14,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976474713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467492128] [2022-11-19 06:44:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:14,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:14,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:44:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:44:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:15,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:15,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467492128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:15,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226595279] [2022-11-19 06:44:15,267 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:15,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:15,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:15,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:15,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:15,672 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-11-19 06:44:15,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:15,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [226595279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:15,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:15,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5] total 13 [2022-11-19 06:44:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615996867] [2022-11-19 06:44:15,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:44:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:44:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:44:15,858 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:15,883 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-19 06:44:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:44:15,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:44:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:15,886 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:44:15,886 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:44:15,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:44:15,889 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:15,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-11-19 06:44:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:44:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-11-19 06:44:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:44:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-19 06:44:15,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2022-11-19 06:44:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:15,898 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-19 06:44:15,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-19 06:44:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:44:15,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:15,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:15,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:16,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 127668256, now seen corresponding path program 1 times [2022-11-19 06:44:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:16,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147216898] [2022-11-19 06:44:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:16,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:16,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:16,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147216898] [2022-11-19 06:44:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147216898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:16,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:16,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:44:16,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581704450] [2022-11-19 06:44:16,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:16,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:44:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:44:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:16,335 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:44:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:16,434 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-19 06:44:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:44:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 06:44:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:16,436 INFO L225 Difference]: With dead ends: 23 [2022-11-19 06:44:16,436 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:44:16,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:44:16,441 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:16,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:44:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 06:44:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:44:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-19 06:44:16,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-11-19 06:44:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:16,458 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-19 06:44:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:44:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-19 06:44:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:44:16,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:16,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:16,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:44:16,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1802983270, now seen corresponding path program 1 times [2022-11-19 06:44:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:16,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468527285] [2022-11-19 06:44:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:16,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468527285] [2022-11-19 06:44:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468527285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548679819] [2022-11-19 06:44:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:16,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:16,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:16,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:44:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:16,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:44:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:16,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:16,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548679819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886837234] [2022-11-19 06:44:16,968 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:44:16,969 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:16,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:16,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:16,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:17,177 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2022-11-19 06:44:17,334 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:17,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '322#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:17,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:17,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:17,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-19 06:44:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921779506] [2022-11-19 06:44:17,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:44:17,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:44:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:44:17,868 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:44:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:18,012 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-19 06:44:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:44:18,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 12 [2022-11-19 06:44:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:18,014 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:44:18,014 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 06:44:18,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:44:18,016 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:18,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 06:44:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 06:44:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 06:44:18,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2022-11-19 06:44:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:18,018 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 06:44:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:44:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 06:44:18,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 06:44:18,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:44:18,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:18,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:18,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 06:44:18,794 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 06:44:18,795 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (<= 0 |ULTIMATE.start_main_~m~0#1|)) (.cse2 (= |#NULL.offset| 0)) (.cse3 (<= 0 |#StackHeapBarrier|)) (.cse1 (<= |ULTIMATE.start_main_~n~0#1| 0)) (.cse4 (= |#NULL.base| 0)) (.cse5 (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| 0) .cse3 .cse4 .cse5) (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< |ULTIMATE.start_main_~m~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) .cse0 (not (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~n~0#1|)) .cse2 .cse3 (or .cse1 (< |ULTIMATE.start_main_~m~0#1| |ULTIMATE.start_main_~n~0#1|)) .cse4 .cse5))) [2022-11-19 06:44:18,795 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 06:44:18,795 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 33) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< |ULTIMATE.start_main_~m~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (<= 0 |ULTIMATE.start_main_~m~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (<= |ULTIMATE.start_main_~n~0#1| 0) (< |ULTIMATE.start_main_~m~0#1| |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648))) [2022-11-19 06:44:18,795 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 33) the Hoare annotation is: (let ((.cse0 (<= 0 |ULTIMATE.start_main_~m~0#1|)) (.cse2 (= |#NULL.offset| 0)) (.cse3 (<= 0 |#StackHeapBarrier|)) (.cse1 (<= |ULTIMATE.start_main_~n~0#1| 0)) (.cse4 (= |#NULL.base| 0)) (.cse5 (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| 0) .cse3 .cse4 .cse5) (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< |ULTIMATE.start_main_~m~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) .cse0 (not (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~n~0#1|)) .cse2 .cse3 (or .cse1 (< |ULTIMATE.start_main_~m~0#1| |ULTIMATE.start_main_~n~0#1|)) .cse4 .cse5))) [2022-11-19 06:44:18,796 INFO L902 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: true [2022-11-19 06:44:18,796 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-19 06:44:18,796 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-19 06:44:18,796 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-19 06:44:18,796 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-19 06:44:18,797 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-19 06:44:18,797 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-19 06:44:18,801 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-19 06:44:18,806 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:44:18,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:44:18 BoogieIcfgContainer [2022-11-19 06:44:18,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:44:18,830 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:44:18,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:44:18,830 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:44:18,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:13" (3/4) ... [2022-11-19 06:44:18,834 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 06:44:18,841 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 06:44:18,846 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-19 06:44:18,847 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-19 06:44:18,847 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 06:44:18,848 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 06:44:18,887 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 06:44:18,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:44:18,888 INFO L158 Benchmark]: Toolchain (without parser) took 5760.96ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 80.1MB in the beginning and 125.2MB in the end (delta: -45.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:44:18,889 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 121.6MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:44:18,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.48ms. Allocated memory is still 121.6MB. Free memory was 79.8MB in the beginning and 96.5MB in the end (delta: -16.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 06:44:18,889 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.68ms. Allocated memory is still 121.6MB. Free memory was 96.5MB in the beginning and 95.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:44:18,890 INFO L158 Benchmark]: Boogie Preprocessor took 24.44ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 94.2MB in the end (delta: 621.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:44:18,890 INFO L158 Benchmark]: RCFGBuilder took 336.00ms. Allocated memory is still 121.6MB. Free memory was 94.2MB in the beginning and 83.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 06:44:18,890 INFO L158 Benchmark]: TraceAbstraction took 4989.57ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 82.8MB in the beginning and 127.3MB in the end (delta: -44.5MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. [2022-11-19 06:44:18,891 INFO L158 Benchmark]: Witness Printer took 58.20ms. Allocated memory is still 155.2MB. Free memory was 127.3MB in the beginning and 125.2MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 06:44:18,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 121.6MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.48ms. Allocated memory is still 121.6MB. Free memory was 79.8MB in the beginning and 96.5MB in the end (delta: -16.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.68ms. Allocated memory is still 121.6MB. Free memory was 96.5MB in the beginning and 95.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.44ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 94.2MB in the end (delta: 621.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 336.00ms. Allocated memory is still 121.6MB. Free memory was 94.2MB in the beginning and 83.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4989.57ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 82.8MB in the beginning and 127.3MB in the end (delta: -44.5MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. * Witness Printer took 58.20ms. Allocated memory is still 155.2MB. Free memory was 127.3MB in the beginning and 125.2MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 124 IncrementalHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 24 mSDtfsCounter, 124 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=1, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 20 NumberOfFragments, 159 HoareAnnotationTreeSize, 11 FomulaSimplifications, 256 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 631 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 6 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 8/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 7, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 1, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 8, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 22, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 35, DAG_COMPRESSION_RETAINED_NODES: 25, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((n <= 2147483647 && m < x + 1) && 0 <= m) && #NULL == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && (n <= 0 || m < n)) && #NULL == 0) && 0 <= n + 2147483648 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-19 06:44:18,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a586f2a-5164-4562-9d35-8934b202fd5a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE