./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8 --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:01,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:01,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:01,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:01,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:01,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:01,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:01,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:01,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:01,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:01,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:01,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:01,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:01,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:01,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:01,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:01,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:01,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:01,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:01,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:01,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:01,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:01,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:01,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:01,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:01,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:01,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:01,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:01,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:01,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:01,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:01,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:01,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:01,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:01,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:01,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:01,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:01,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:01,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:01,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:01,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:01,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:07:01,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:01,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:01,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:01,682 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:01,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:01,682 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:01,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:07:01,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:01,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:01,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:07:01,691 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:07:01,691 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:01,691 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:07:01,691 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:07:01,692 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:07:01,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:01,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:07:01,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:01,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:07:01,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:01,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:01,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:01,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:01,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:01,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:07:01,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:01,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:01,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:01,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:01,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:01,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:01,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:01,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:01,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:01,698 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:07:01,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:07:01,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:01,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:01,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:01,699 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2021-11-07 02:07:02,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:02,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:02,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:02,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:02,065 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:02,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-fpi/pcompf.c [2021-11-07 02:07:02,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/data/4cc13f3d2/389da647e17a460f9a38ec75780bbffa/FLAGfba3da01d [2021-11-07 02:07:02,677 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:02,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/sv-benchmarks/c/array-fpi/pcompf.c [2021-11-07 02:07:02,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/data/4cc13f3d2/389da647e17a460f9a38ec75780bbffa/FLAGfba3da01d [2021-11-07 02:07:03,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/data/4cc13f3d2/389da647e17a460f9a38ec75780bbffa [2021-11-07 02:07:03,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:03,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:03,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:03,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:03,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:03,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d5e036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03, skipping insertion in model container [2021-11-07 02:07:03,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:03,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:03,258 WARN L228 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_7ff9f344-05a1-49ef-a719-82e88a496ad9/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-07 02:07:03,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:03,315 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:07:03,332 WARN L228 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_7ff9f344-05a1-49ef-a719-82e88a496ad9/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-07 02:07:03,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:03,384 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:07:03,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03 WrapperNode [2021-11-07 02:07:03,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:03,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:03,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:07:03,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:07:03,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:03,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:07:03,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:07:03,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:07:03,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:07:03,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:07:03,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:07:03,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:07:03,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (1/1) ... [2021-11-07 02:07:03,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:03,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:03,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:07:03,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:07:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:07:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:07:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 02:07:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:07:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:07:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:07:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 02:07:04,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:04,115 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-07 02:07:04,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:04 BoogieIcfgContainer [2021-11-07 02:07:04,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:04,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:04,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:04,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:04,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:07:03" (1/3) ... [2021-11-07 02:07:04,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60090f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:04, skipping insertion in model container [2021-11-07 02:07:04,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:03" (2/3) ... [2021-11-07 02:07:04,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60090f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:04, skipping insertion in model container [2021-11-07 02:07:04,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:04" (3/3) ... [2021-11-07 02:07:04,132 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2021-11-07 02:07:04,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:04,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:07:04,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:04,213 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:07:04,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:07:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) [2021-11-07 02:07:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:07:04,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:04,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:04,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2021-11-07 02:07:04,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:04,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021545536] [2021-11-07 02:07:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:04,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:04,389 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:07:04,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32890655] [2021-11-07 02:07:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:04,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:04,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:04,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:07:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:07:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:04,643 INFO L354 Elim1Store]: treesize reduction 55, result has 40.9 percent of original size [2021-11-07 02:07:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 45 [2021-11-07 02:07:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:04,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:07:04,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021545536] [2021-11-07 02:07:04,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:07:04,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32890655] [2021-11-07 02:07:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32890655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:04,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:04,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:07:04,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500491909] [2021-11-07 02:07:04,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:07:04,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:07:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:07:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:07:04,897 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-11-07 02:07:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:05,003 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-07 02:07:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:05,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 8 [2021-11-07 02:07:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:05,012 INFO L225 Difference]: With dead ends: 37 [2021-11-07 02:07:05,012 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 02:07:05,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 02:07:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-11-07 02:07:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-07 02:07:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2021-11-07 02:07:05,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2021-11-07 02:07:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:05,049 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-11-07 02:07:05,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-11-07 02:07:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2021-11-07 02:07:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:07:05,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:05,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:05,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 02:07:05,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 02:07:05,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2021-11-07 02:07:05,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:05,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882517665] [2021-11-07 02:07:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:05,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:07:05,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354363762] [2021-11-07 02:07:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:05,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:05,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:07:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:05,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:05,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:07:05,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882517665] [2021-11-07 02:07:05,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:07:05,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354363762] [2021-11-07 02:07:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354363762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:05,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 02:07:05,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18530476] [2021-11-07 02:07:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:07:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:05,520 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-07 02:07:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:05,605 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-07 02:07:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 9 [2021-11-07 02:07:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:05,614 INFO L225 Difference]: With dead ends: 36 [2021-11-07 02:07:05,615 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 02:07:05,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 02:07:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2021-11-07 02:07:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-07 02:07:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-07 02:07:05,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-11-07 02:07:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:05,626 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-07 02:07:05,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-07 02:07:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-07 02:07:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:07:05,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:05,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:05,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:05,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2021-11-07 02:07:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:05,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793710435] [2021-11-07 02:07:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:05,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:07:05,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636031674] [2021-11-07 02:07:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:05,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:05,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 02:07:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:06,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:06,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:07:06,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793710435] [2021-11-07 02:07:06,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:07:06,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636031674] [2021-11-07 02:07:06,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636031674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:06,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275523067] [2021-11-07 02:07:06,119 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-07 02:07:06,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:07:06,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:07:06,131 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:07:06,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:07:06,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,172 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:07:06,178 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:07:06,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-07 02:07:06,204 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_20|], 21=[|v_#valid_21|]} [2021-11-07 02:07:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:07:06,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:07:06,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:07:06,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:06,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:07:06,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:07:06,354 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:07:06,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:06,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-07 02:07:06,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:124, output treesize:99 [2021-11-07 02:07:06,404 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.8 percent of original size [2021-11-07 02:07:06,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 02:07:06,409 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-07 02:07:06,411 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-07 02:07:06,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 276 [2021-11-07 02:07:06,441 INFO L446 ElimStorePlain]: Different costs {12=[|v_#length_21|], 45=[|v_#valid_22|]} [2021-11-07 02:07:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,523 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 02:07:06,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-11-07 02:07:06,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-07 02:07:06,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-07 02:07:06,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 02:07:06,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 02:07:06,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 02:07:06,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:06,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,760 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-07 02:07:06,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-07 02:07:06,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 02:07:06,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 02:07:06,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:06,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 44 [2021-11-07 02:07:06,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-07 02:07:06,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-07 02:07:06,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:06,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-11-07 02:07:06,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:07:06,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:518, output treesize:214 [2021-11-07 02:07:06,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,938 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:06,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:06,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-07 02:07:06,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-07 02:07:07,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:07:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 72 [2021-11-07 02:07:07,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:07:07,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:248, output treesize:238 [2021-11-07 02:07:07,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,335 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:07,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,350 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:07,351 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-07 02:07:07,358 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:07,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-07 02:07:07,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 513 [2021-11-07 02:07:07,372 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:07,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 483 [2021-11-07 02:07:07,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 568 [2021-11-07 02:07:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 87 [2021-11-07 02:07:07,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-07 02:07:07,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,494 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-07 02:07:07,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:07:07,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 72 [2021-11-07 02:07:07,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,650 INFO L180 QuantifierPusher]: treesize reduction 145, result has 78.1 percent of original size [2021-11-07 02:07:07,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 518 [2021-11-07 02:07:07,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:07:07,660 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:675, output treesize:518 [2021-11-07 02:07:07,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,813 INFO L180 QuantifierPusher]: treesize reduction 54, result has 62.5 percent of original size [2021-11-07 02:07:07,821 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:07:07,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-07 02:07:07,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-07 02:07:07,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-07 02:07:07,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:07:07,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:07:07,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:07:07,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 02:07:07,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:07:07,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:83 [2021-11-07 02:07:07,853 INFO L180 QuantifierPusher]: treesize reduction 55, result has 53.0 percent of original size [2021-11-07 02:07:07,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:07:07,864 INFO L185 QuantifierPusher]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-11-07 02:07:07,867 INFO L180 QuantifierPusher]: treesize reduction 5, result has 92.5 percent of original size [2021-11-07 02:07:07,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-07 02:07:07,875 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:07:08,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:07:08,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:08,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 02:07:08,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370282846] [2021-11-07 02:07:08,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:08,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:07:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:07:08,524 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-07 02:07:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:08,616 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-07 02:07:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:07:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 9 [2021-11-07 02:07:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:08,617 INFO L225 Difference]: With dead ends: 33 [2021-11-07 02:07:08,617 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 02:07:08,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:07:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 02:07:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-07 02:07:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-07 02:07:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-07 02:07:08,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-11-07 02:07:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:08,622 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-07 02:07:08,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-07 02:07:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-07 02:07:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:07:08,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:08,622 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:08,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 02:07:08,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-07 02:07:08,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2021-11-07 02:07:08,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:08,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923129596] [2021-11-07 02:07:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:08,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:07:08,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867077123] [2021-11-07 02:07:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:08,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:08,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:08,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 02:07:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:08,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:09,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:07:09,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923129596] [2021-11-07 02:07:09,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:07:09,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867077123] [2021-11-07 02:07:09,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867077123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:09,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:09,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-07 02:07:09,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550144855] [2021-11-07 02:07:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:07:09,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:07:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:07:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:09,046 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-11-07 02:07:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:09,114 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-07 02:07:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 02:07:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:09,116 INFO L225 Difference]: With dead ends: 29 [2021-11-07 02:07:09,116 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 02:07:09,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 02:07:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-07 02:07:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2021-11-07 02:07:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-07 02:07:09,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2021-11-07 02:07:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:09,120 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-07 02:07:09,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-11-07 02:07:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-07 02:07:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:07:09,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:09,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:09,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:09,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 02:07:09,342 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2021-11-07 02:07:09,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:07:09,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658419010] [2021-11-07 02:07:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:09,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:07:09,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:07:09,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354379150] [2021-11-07 02:07:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:09,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:09,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:09,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ff9f344-05a1-49ef-a719-82e88a496ad9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 02:07:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:07:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 12 [2021-11-07 02:07:09,512 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:07:09,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2021-11-07 02:07:09,668 INFO L354 Elim1Store]: treesize reduction 113, result has 33.5 percent of original size [2021-11-07 02:07:09,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 94 [2021-11-07 02:07:10,572 INFO L354 Elim1Store]: treesize reduction 373, result has 39.4 percent of original size [2021-11-07 02:07:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 306