./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW --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 cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- 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-4e7fbc6 [2022-11-23 14:43:04,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:43:04,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:43:04,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:43:04,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:43:04,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:43:04,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:43:04,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:43:04,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:43:04,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:43:04,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:43:04,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:43:04,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:43:04,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:43:04,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:43:04,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:43:04,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:43:04,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:43:04,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:43:04,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:43:04,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:43:04,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:43:04,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:43:04,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:43:04,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:43:04,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:43:04,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:43:04,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:43:04,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:43:04,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:43:04,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:43:04,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:43:04,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:43:04,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:43:04,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:43:04,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:43:04,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:43:04,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:43:04,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:43:04,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:43:04,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:43:04,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:43:04,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:43:04,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:43:04,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:43:04,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:43:04,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:43:04,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:43:04,684 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:43:04,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:43:04,684 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:43:04,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:43:04,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:43:04,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:43:04,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:43:04,686 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:43:04,687 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:43:04,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:43:04,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:43:04,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:43:04,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:43:04,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:43:04,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:43:04,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:43:04,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:43:04,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:43:04,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:43:04,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:43:04,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:43:04,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:43:04,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:43:04,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:43:04,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:43:04,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:43:04,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:04,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:43:04,693 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:43:04,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:43:04,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:43:04,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:43:04,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:43:04,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:43:04,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:43:04,694 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_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2022-11-23 14:43:05,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:43:05,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:43:05,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:43:05,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:43:05,045 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:43:05,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-11-23 14:43:07,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:43:08,238 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:43:08,243 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-11-23 14:43:08,263 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/data/eb19492de/36dd476bf4b54020a77f998268937101/FLAG4f9a32f26 [2022-11-23 14:43:08,282 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/data/eb19492de/36dd476bf4b54020a77f998268937101 [2022-11-23 14:43:08,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:43:08,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:43:08,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:08,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:43:08,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:43:08,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1653abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08, skipping insertion in model container [2022-11-23 14:43:08,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:43:08,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:43:08,735 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_9758f660-f949-4664-9acb-0ed1cbe0e928/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2022-11-23 14:43:08,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:08,760 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:43:08,823 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_9758f660-f949-4664-9acb-0ed1cbe0e928/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2022-11-23 14:43:08,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:08,848 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:43:08,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08 WrapperNode [2022-11-23 14:43:08,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:08,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:08,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:43:08,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:43:08,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,889 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2022-11-23 14:43:08,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:08,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:43:08,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:43:08,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:43:08,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:43:08,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:43:08,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:43:08,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:43:08,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (1/1) ... [2022-11-23 14:43:08,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:08,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:43:08,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:43:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-23 14:43:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-23 14:43:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:43:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:43:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:43:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:43:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:43:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:43:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:43:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:43:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:43:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:43:09,191 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:43:09,193 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:43:09,261 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-23 14:43:09,547 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:43:09,640 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:43:09,640 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 14:43:09,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:09 BoogieIcfgContainer [2022-11-23 14:43:09,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:43:09,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:43:09,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:43:09,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:43:09,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:08" (1/3) ... [2022-11-23 14:43:09,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb46fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:09, skipping insertion in model container [2022-11-23 14:43:09,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:08" (2/3) ... [2022-11-23 14:43:09,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb46fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:09, skipping insertion in model container [2022-11-23 14:43:09,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:09" (3/3) ... [2022-11-23 14:43:09,660 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2022-11-23 14:43:09,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:43:09,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:43:09,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:43:09,760 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;@c9a9d92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:43:09,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:43:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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) [2022-11-23 14:43:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:43:09,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:09,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:09,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1570243634, now seen corresponding path program 1 times [2022-11-23 14:43:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800644033] [2022-11-23 14:43:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:10,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:10,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800644033] [2022-11-23 14:43:10,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800644033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:10,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:10,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:43:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52835711] [2022-11-23 14:43:10,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:43:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:43:10,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:10,104 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-23 14:43:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:10,171 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-23 14:43:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:43:10,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-23 14:43:10,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:10,181 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:43:10,181 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 14:43:10,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:10,187 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:10,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:43:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 14:43:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-23 14:43:10,216 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) [2022-11-23 14:43:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-23 14:43:10,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2022-11-23 14:43:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:10,218 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-23 14:43:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-23 14:43:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-23 14:43:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:43:10,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:10,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:10,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:43:10,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 299858783, now seen corresponding path program 1 times [2022-11-23 14:43:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:10,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265851929] [2022-11-23 14:43:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:10,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:10,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265851929] [2022-11-23 14:43:10,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265851929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126453062] [2022-11-23 14:43:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:10,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:10,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:10,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:43:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:10,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:43:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:10,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:10,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126453062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626950412] [2022-11-23 14:43:10,868 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:43:10,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:10,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:10,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:10,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:11,110 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:43:11,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-23 14:43:11,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:43:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-23 14:43:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 14:43:11,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:11,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:11,584 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-23 14:43:11,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 255 [2022-11-23 14:43:11,650 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 14:43:11,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 233 [2022-11-23 14:43:12,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,489 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:43:12,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 315 treesize of output 293 [2022-11-23 14:43:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,625 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 14:43:12,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 296 [2022-11-23 14:43:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 299 [2022-11-23 14:43:12,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,830 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-23 14:43:12,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 455 treesize of output 483 [2022-11-23 14:43:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 317 [2022-11-23 14:43:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:12,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:13,003 INFO L321 Elim1Store]: treesize reduction 74, result has 34.5 percent of original size [2022-11-23 14:43:13,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 448 treesize of output 472 [2022-11-23 14:43:13,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 78 [2022-11-23 14:43:13,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:13,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 17 [2022-11-23 14:43:13,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2022-11-23 14:43:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 757 treesize of output 704 [2022-11-23 14:43:13,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 14:43:13,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 684 treesize of output 670 [2022-11-23 14:43:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:13,975 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-23 14:43:13,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 720 treesize of output 667 [2022-11-23 14:43:14,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:14,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:14,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:14,271 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 14:43:14,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 180 [2022-11-23 14:43:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:14,361 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:43:14,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 164 [2022-11-23 14:43:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-23 14:43:14,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 14:43:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-23 14:43:14,515 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2022-11-23 14:43:14,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 30 [2022-11-23 14:43:14,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:43:14,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 65 [2022-11-23 14:43:14,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-11-23 14:43:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:14,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-23 14:43:14,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:14,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:14,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [626950412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:15,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:15,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2022-11-23 14:43:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744929268] [2022-11-23 14:43:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:43:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:43:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:43:15,019 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-11-23 14:43:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:15,092 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2022-11-23 14:43:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:43:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 10 [2022-11-23 14:43:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:15,093 INFO L225 Difference]: With dead ends: 19 [2022-11-23 14:43:15,094 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 14:43:15,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:43:15,095 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:15,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 14:43:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-23 14:43:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2022-11-23 14:43:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-23 14:43:15,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2022-11-23 14:43:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:15,101 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-23 14:43:15,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-11-23 14:43:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-23 14:43:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:43:15,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:15,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:15,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:15,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1448453533, now seen corresponding path program 1 times [2022-11-23 14:43:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:15,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440597680] [2022-11-23 14:43:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:43:15,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:15,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440597680] [2022-11-23 14:43:15,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440597680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:15,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865854576] [2022-11-23 14:43:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:15,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:15,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:15,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:15,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:43:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:43:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:43:15,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:43:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865854576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471026031] [2022-11-23 14:43:15,578 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:43:15,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:15,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:15,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:15,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:15,628 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-23 14:43:15,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-23 14:43:15,676 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:43:15,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-23 14:43:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:15,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-23 14:43:15,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 14:43:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:15,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:15,916 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-23 14:43:15,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 255 [2022-11-23 14:43:15,953 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 14:43:15,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 233 [2022-11-23 14:43:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,385 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:43:16,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 221 [2022-11-23 14:43:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,478 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 14:43:16,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 239 treesize of output 224 [2022-11-23 14:43:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 219 [2022-11-23 14:43:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 219 [2022-11-23 14:43:16,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,666 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-23 14:43:16,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 403 [2022-11-23 14:43:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 440 treesize of output 470 [2022-11-23 14:43:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,781 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-23 14:43:16,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 367 treesize of output 322 [2022-11-23 14:43:16,848 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-23 14:43:16,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 125 [2022-11-23 14:43:16,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 64 [2022-11-23 14:43:16,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:16,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:16,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 11 [2022-11-23 14:43:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 566 treesize of output 513 [2022-11-23 14:43:17,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 14:43:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 479 [2022-11-23 14:43:17,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:17,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:17,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:17,448 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 14:43:17,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 185 [2022-11-23 14:43:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:17,527 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:43:17,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 164 [2022-11-23 14:43:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-23 14:43:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 14:43:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-23 14:43:17,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 67 [2022-11-23 14:43:17,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 45 [2022-11-23 14:43:17,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2022-11-23 14:43:17,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 53 [2022-11-23 14:43:17,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2022-11-23 14:43:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:17,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-23 14:43:17,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:17,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:17,950 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:17,955 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:17,957 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:17,987 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:17,989 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:17,993 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:18,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [471026031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:18,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:18,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2022-11-23 14:43:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762839977] [2022-11-23 14:43:18,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:43:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:43:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:43:18,454 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-11-23 14:43:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:18,559 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-23 14:43:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:43:18,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 12 [2022-11-23 14:43:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:18,560 INFO L225 Difference]: With dead ends: 22 [2022-11-23 14:43:18,560 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 14:43:18,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:43:18,561 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 14:43:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-23 14:43:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-11-23 14:43:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-23 14:43:18,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2022-11-23 14:43:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-23 14:43:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-11-23 14:43:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-23 14:43:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:43:18,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:18,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:18,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:43:18,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:43:18,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 474531345, now seen corresponding path program 1 times [2022-11-23 14:43:18,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:18,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784249754] [2022-11-23 14:43:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:43:18,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784249754] [2022-11-23 14:43:18,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784249754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656299520] [2022-11-23 14:43:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:18,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:43:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:43:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:43:19,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:43:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656299520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992316442] [2022-11-23 14:43:19,079 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:43:19,079 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:19,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:19,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:19,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:19,130 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-23 14:43:19,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-23 14:43:19,168 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:43:19,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-23 14:43:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 14:43:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-23 14:43:19,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 14:43:19,393 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-23 14:43:19,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 255 [2022-11-23 14:43:19,429 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 14:43:19,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 233 [2022-11-23 14:43:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,808 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:43:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 221 [2022-11-23 14:43:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,883 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 14:43:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 239 treesize of output 224 [2022-11-23 14:43:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 219 [2022-11-23 14:43:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 219 [2022-11-23 14:43:19,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:19,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,052 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-23 14:43:20,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 398 [2022-11-23 14:43:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 440 treesize of output 475 [2022-11-23 14:43:20,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 409 treesize of output 351 [2022-11-23 14:43:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 317 [2022-11-23 14:43:20,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 14:43:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,349 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-23 14:43:20,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 367 treesize of output 322 [2022-11-23 14:43:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 338 [2022-11-23 14:43:20,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 14:43:20,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 314 [2022-11-23 14:43:20,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:20,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,791 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:43:20,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 189 [2022-11-23 14:43:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:20,860 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-23 14:43:20,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 173 [2022-11-23 14:43:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-23 14:43:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 14:43:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-23 14:43:20,990 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2022-11-23 14:43:20,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 101 [2022-11-23 14:43:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 71 [2022-11-23 14:43:21,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 53 [2022-11-23 14:43:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-23 14:43:21,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2022-11-23 14:43:21,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:43:21,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:43:21,193 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:21,194 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:21,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:43:21,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:43:21,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:43:21,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:43:21,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 14:43:21,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:21,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [992316442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:21,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:21,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 9 [2022-11-23 14:43:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238695083] [2022-11-23 14:43:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:43:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:43:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:43:21,983 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-11-23 14:43:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:22,192 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2022-11-23 14:43:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:43:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 [2022-11-23 14:43:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:22,193 INFO L225 Difference]: With dead ends: 16 [2022-11-23 14:43:22,193 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:43:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:43:22,194 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:43:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:43:22,196 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) [2022-11-23 14:43:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:43:22,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-11-23 14:43:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:22,196 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:43:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-11-23 14:43:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:43:22,196 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:43:22,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:43:22,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:43:22,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:22,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 14:43:23,130 INFO L902 garLoopResultBuilder]: At program point myexitENTRY(lines 572 574) the Hoare annotation is: true [2022-11-23 14:43:23,130 INFO L902 garLoopResultBuilder]: At program point L573(line 573) the Hoare annotation is: true [2022-11-23 14:43:23,131 INFO L899 garLoopResultBuilder]: For program point myexitEXIT(lines 572 574) no Hoare annotation was computed. [2022-11-23 14:43:23,131 INFO L899 garLoopResultBuilder]: For program point L589(lines 589 591) no Hoare annotation was computed. [2022-11-23 14:43:23,131 INFO L899 garLoopResultBuilder]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2022-11-23 14:43:23,131 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 14:43:23,131 INFO L902 garLoopResultBuilder]: At program point L590(line 590) the Hoare annotation is: true [2022-11-23 14:43:23,131 INFO L895 garLoopResultBuilder]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_dll_update_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_update_at_~index#1| 1) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |ULTIMATE.start_dll_update_at_#in~data#1| 3) (<= |ULTIMATE.start_dll_update_at_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_update_at_#in~index#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dll_update_at_~data#1| 3) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (= |#NULL.base| 0)) [2022-11-23 14:43:23,131 INFO L902 garLoopResultBuilder]: At program point L642(lines 624 643) the Hoare annotation is: true [2022-11-23 14:43:23,131 INFO L895 garLoopResultBuilder]: At program point L618-2(lines 618 621) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_dll_update_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_update_at_~index#1| 1) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |ULTIMATE.start_dll_update_at_#in~data#1| 3) (<= |ULTIMATE.start_dll_update_at_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_update_at_#in~index#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dll_update_at_~data#1| 3) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |#NULL.base| 0)) [2022-11-23 14:43:23,132 INFO L899 garLoopResultBuilder]: For program point L635(lines 635 637) no Hoare annotation was computed. [2022-11-23 14:43:23,132 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 641) no Hoare annotation was computed. [2022-11-23 14:43:23,132 INFO L895 garLoopResultBuilder]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2022-11-23 14:43:23,132 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 14:43:23,132 INFO L895 garLoopResultBuilder]: At program point L636(lines 624 643) the Hoare annotation is: false [2022-11-23 14:43:23,132 INFO L895 garLoopResultBuilder]: At program point L587-2(lines 587 600) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) [2022-11-23 14:43:23,132 INFO L902 garLoopResultBuilder]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2022-11-23 14:43:23,132 INFO L895 garLoopResultBuilder]: At program point L629-3(lines 629 632) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_dll_create_~data#1|)) (.cse1 (<= 2 |ULTIMATE.start_dll_create_#in~len#1|)) (.cse2 (<= |ULTIMATE.start_dll_create_~data#1| 1)) (.cse3 (= |ULTIMATE.start_main_~data~0#1| 1)) (.cse4 (<= |ULTIMATE.start_dll_create_#in~len#1| 2)) (.cse5 (<= |ULTIMATE.start_dll_create_~len#1| 0)) (.cse6 (<= 1 |ULTIMATE.start_dll_create_#in~data#1|)) (.cse7 (= |ULTIMATE.start_main_~len~0#1| 2)) (.cse8 (<= |ULTIMATE.start_dll_create_#in~data#1| 1)) (.cse9 (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0)) (.cse10 (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|)) (.cse11 (<= 0 |#StackHeapBarrier|)) (.cse12 (<= |ULTIMATE.start_main_~s~0#1.offset| 0)) (.cse13 (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|)) (.cse14 (= |#NULL.base| 0))) (or (and .cse0 .cse1 (<= |#NULL.offset| 0) .cse2 (= |ULTIMATE.start_dll_create_~head~0#1.base| |ULTIMATE.start_dll_create_#res#1.base|) (= |ULTIMATE.start_dll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (= |ULTIMATE.start_dll_create_#res#1.base| |ULTIMATE.start_main_~s~0#1.base|) .cse10 (<= 0 |#NULL.offset|) .cse11 .cse12 .cse13 (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) .cse14) (and (<= 0 |ULTIMATE.start_dll_update_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) .cse0 .cse1 (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_update_at_~index#1| 1) .cse2 (<= |ULTIMATE.start_dll_update_at_#in~data#1| 3) (<= |ULTIMATE.start_dll_update_at_#in~head#1.offset| 0) .cse3 .cse4 .cse5 .cse6 (<= |ULTIMATE.start_dll_update_at_#in~index#1| 1) .cse7 (= |#NULL.offset| 0) (<= |ULTIMATE.start_dll_update_at_~data#1| 3) .cse8 .cse9 .cse10 (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) .cse11 .cse12 .cse13 .cse14))) [2022-11-23 14:43:23,136 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 14:43:23,138 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:43:23,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:43:23 BoogieIcfgContainer [2022-11-23 14:43:23,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:43:23,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:43:23,162 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:43:23,163 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:43:23,163 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:09" (3/4) ... [2022-11-23 14:43:23,166 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:43:23,172 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2022-11-23 14:43:23,176 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2022-11-23 14:43:23,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-23 14:43:23,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 14:43:23,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:43:23,199 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((1 <= data && 2 <= unknown-#in~len-unknown) && #NULL <= 0) && data <= 1) && head == \result) && \result == s) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && len == 2) && unknown-#in~data-unknown <= 1) && head <= 0) && \result == s) && 0 <= head) && 0 <= #NULL) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && len == i + 1) && #NULL == 0) || (((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && i <= 1) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && #NULL == 0) [2022-11-23 14:43:23,199 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && len == i + 1) && #NULL == 0 [2022-11-23 14:43:23,199 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && i <= 1) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && #NULL == 0 [2022-11-23 14:43:23,220 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:43:23,220 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:43:23,221 INFO L158 Benchmark]: Toolchain (without parser) took 14934.45ms. Allocated memory was 155.2MB in the beginning and 325.1MB in the end (delta: 169.9MB). Free memory was 114.0MB in the beginning and 130.4MB in the end (delta: -16.4MB). Peak memory consumption was 153.7MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,221 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:43:23,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 556.69ms. Allocated memory is still 155.2MB. Free memory was 114.0MB in the beginning and 114.5MB in the end (delta: -536.3kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,222 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.48ms. Allocated memory is still 155.2MB. Free memory was 114.5MB in the beginning and 112.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,222 INFO L158 Benchmark]: Boogie Preprocessor took 29.98ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 110.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:43:23,222 INFO L158 Benchmark]: RCFGBuilder took 726.69ms. Allocated memory is still 155.2MB. Free memory was 110.9MB in the beginning and 91.5MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,222 INFO L158 Benchmark]: TraceAbstraction took 13511.27ms. Allocated memory was 155.2MB in the beginning and 325.1MB in the end (delta: 169.9MB). Free memory was 90.7MB in the beginning and 133.5MB in the end (delta: -42.8MB). Peak memory consumption was 127.7MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,223 INFO L158 Benchmark]: Witness Printer took 58.12ms. Allocated memory is still 325.1MB. Free memory was 133.5MB in the beginning and 130.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:43:23,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 556.69ms. Allocated memory is still 155.2MB. Free memory was 114.0MB in the beginning and 114.5MB in the end (delta: -536.3kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.48ms. Allocated memory is still 155.2MB. Free memory was 114.5MB in the beginning and 112.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.98ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 110.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 726.69ms. Allocated memory is still 155.2MB. Free memory was 110.9MB in the beginning and 91.5MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 13511.27ms. Allocated memory was 155.2MB in the beginning and 325.1MB in the end (delta: 169.9MB). Free memory was 90.7MB in the beginning and 133.5MB in the end (delta: -42.8MB). Peak memory consumption was 127.7MB. Max. memory is 16.1GB. * Witness Printer took 58.12ms. Allocated memory is still 325.1MB. Free memory was 133.5MB in the beginning and 130.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 641]: 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, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.4s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 49 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 30 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 121 IncrementalHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 19 mSDtfsCounter, 121 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 21, 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, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 13 PreInvPairs, 23 NumberOfFragments, 359 HoareAnnotationTreeSize, 13 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1030 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 176 SizeOfPredicates, 6 NumberOfNonLiveVariables, 534 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 9/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 8.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 23, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 8.3s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 56, TOOLS_QUANTIFIERELIM_TIME: 8.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.9s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 113, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 8, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 13, DOMAIN_ISSUBSETEQ_TIME: 0.1s, DOMAIN_ISBOTTOM_APPLICATIONS: 23, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 5, LOOP_SUMMARIZER_CACHE_MISSES: 5, LOOP_SUMMARIZER_OVERALL_TIME: 8.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 8.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 13, 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: 310, DAG_COMPRESSION_RETAINED_NODES: 100, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 633]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && len == i + 1) && #NULL == 0 - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: (((((((((((((1 <= data && 2 <= unknown-#in~len-unknown) && len <= 2) && #NULL <= 0) && data <= 1) && data == 1) && unknown-#in~len-unknown <= 2) && 1 <= unknown-#in~data-unknown) && len == 2) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 629]: Loop Invariant Derived loop invariant: ((((((((((((((((((((1 <= data && 2 <= unknown-#in~len-unknown) && #NULL <= 0) && data <= 1) && head == \result) && \result == s) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && len == 2) && unknown-#in~data-unknown <= 1) && head <= 0) && \result == s) && 0 <= head) && 0 <= #NULL) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && len == i + 1) && #NULL == 0) || (((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && i <= 1) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && #NULL == 0) - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((0 <= #in~head && 0 <= s) && 1 <= data) && 2 <= unknown-#in~len-unknown) && \result <= 0) && index <= 1) && data <= 1) && unknown-#in~data-unknown <= 3) && #in~head <= 0) && data == 1) && unknown-#in~len-unknown <= 2) && len <= 0) && 1 <= unknown-#in~data-unknown) && unknown-#in~index-unknown <= 1) && len == 2) && #NULL == 0) && data <= 3) && unknown-#in~data-unknown <= 1) && head <= 0) && 0 <= head) && i <= 1) && new_data <= 3) && 0 <= unknown-#StackHeapBarrier-unknown) && s <= 0) && 0 <= \result) && #NULL == 0 RESULT: Ultimate proved your program to be correct! [2022-11-23 14:43:23,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9758f660-f949-4664-9acb-0ed1cbe0e928/bin/utaipan-Q6hlc19bkW/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