./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE --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 aaea6fef281249794f41087d72bdcfa92bd0b0609c0833888767b94608daa7f2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:56:54,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:56:54,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:56:54,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:56:54,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:56:54,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:56:54,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:56:54,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:56:54,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:56:54,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:56:54,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:56:54,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:56:54,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:56:54,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:56:54,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:56:54,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:56:54,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:56:54,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:56:54,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:56:54,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:56:54,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:56:54,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:56:54,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:56:54,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:56:54,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:56:54,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:56:54,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:56:54,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:56:54,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:56:54,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:56:54,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:56:54,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:56:54,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:56:54,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:56:54,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:56:54,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:56:54,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:56:54,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:56:54,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:56:54,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:56:54,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:56:54,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:56:54,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:56:54,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:56:54,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:56:54,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:56:54,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:56:54,548 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:56:54,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:56:54,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:56:54,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:56:54,549 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:56:54,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:56:54,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:56:54,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:56:54,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:56:54,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:56:54,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:56:54,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:56:54,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:56:54,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:56:54,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:56:54,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:56:54,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:56:54,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:56:54,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:56:54,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:56:54,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:56:54,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:56:54,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:56:54,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:56:54,555 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:56:54,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:56:54,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:56:54,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:56:54,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:56:54,556 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_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaea6fef281249794f41087d72bdcfa92bd0b0609c0833888767b94608daa7f2 [2021-10-24 10:56:54,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:56:54,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:56:54,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:56:54,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:56:54,829 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:56:54,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/loops/sum04-2.i [2021-10-24 10:56:54,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/data/527766a27/f24be66157544d28a90e00fe9ef60c3f/FLAG65e474b02 [2021-10-24 10:56:55,360 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:56:55,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/sv-benchmarks/c/loops/sum04-2.i [2021-10-24 10:56:55,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/data/527766a27/f24be66157544d28a90e00fe9ef60c3f/FLAG65e474b02 [2021-10-24 10:56:55,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/data/527766a27/f24be66157544d28a90e00fe9ef60c3f [2021-10-24 10:56:55,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:56:55,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:56:55,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:56:55,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:56:55,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:56:55,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8b72c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55, skipping insertion in model container [2021-10-24 10:56:55,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:56:55,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:56:55,538 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_50a4b9fd-936f-44de-a3d6-29316099e000/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-24 10:56:55,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:56:55,555 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:56:55,568 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_50a4b9fd-936f-44de-a3d6-29316099e000/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-24 10:56:55,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:56:55,584 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:56:55,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55 WrapperNode [2021-10-24 10:56:55,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:56:55,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:56:55,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:56:55,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:56:55,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:56:55,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:56:55,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:56:55,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:56:55,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:56:55,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:56:55,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:56:55,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:56:55,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (1/1) ... [2021-10-24 10:56:55,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:56:55,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:56:55,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:56:55,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:56:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:56:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:56:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:56:55,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:56:55,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:56:55,999 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:56:56,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:56:56 BoogieIcfgContainer [2021-10-24 10:56:56,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:56:56,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:56:56,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:56:56,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:56:56,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:56:55" (1/3) ... [2021-10-24 10:56:56,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211141e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:56:56, skipping insertion in model container [2021-10-24 10:56:56,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:56:55" (2/3) ... [2021-10-24 10:56:56,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211141e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:56:56, skipping insertion in model container [2021-10-24 10:56:56,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:56:56" (3/3) ... [2021-10-24 10:56:56,011 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2021-10-24 10:56:56,016 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:56:56,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:56:56,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:56:56,131 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 [2021-10-24 10:56:56,131 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:56:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:56:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:56:56,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:56:56,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:56:56,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:56:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:56:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1880326, now seen corresponding path program 1 times [2021-10-24 10:56:56,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:56:56,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51352956] [2021-10-24 10:56:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:56:56,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:56:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:56:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:56,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:56:56,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51352956] [2021-10-24 10:56:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51352956] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:56:56,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:56:56,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:56:56,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644955821] [2021-10-24 10:56:56,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:56:56,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:56:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:56:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:56:56,398 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:56:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:56:56,434 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-24 10:56:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:56:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-24 10:56:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:56:56,444 INFO L225 Difference]: With dead ends: 13 [2021-10-24 10:56:56,445 INFO L226 Difference]: Without dead ends: 6 [2021-10-24 10:56:56,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:56:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-24 10:56:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-24 10:56:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-10-24 10:56:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-24 10:56:56,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-24 10:56:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:56:56,479 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-24 10:56:56,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:56:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-24 10:56:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:56:56,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:56:56,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:56:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:56:56,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:56:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:56:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash 58185316, now seen corresponding path program 1 times [2021-10-24 10:56:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:56:56,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293513921] [2021-10-24 10:56:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:56:56,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:56:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:56:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:56,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:56:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293513921] [2021-10-24 10:56:56,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293513921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:56:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407880957] [2021-10-24 10:56:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:56:56,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:56:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:56:56,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:56:56,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:56:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:56:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:56:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:56:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:56,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:56:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407880957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:56:56,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409266319] [2021-10-24 10:56:56,729 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-24 10:56:56,729 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:56:56,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:56:56,740 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:56:56,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:56:56,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,774 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:56,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:56:56,779 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:56,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:56:56,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-24 10:56:56,806 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-10-24 10:56:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:56,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:56:56,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:56,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:56,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:56,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:56,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2021-10-24 10:56:56,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:56,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:56,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:56,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:56,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:56,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:56:56,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:56:56,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:92, output treesize:77 [2021-10-24 10:56:56,928 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.7 percent of original size [2021-10-24 10:56:56,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:56:56,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:56,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:57,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-10-24 10:56:57,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:57,226 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-10-24 10:56:57,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-24 10:56:57,245 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:56:57,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:56:57,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:56:57,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-24 10:56:57,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664650257] [2021-10-24 10:56:57,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:56:57,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:56:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:56:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:56:57,489 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-10-24 10:56:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:56:57,509 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-10-24 10:56:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:56:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 5 [2021-10-24 10:56:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:56:57,510 INFO L225 Difference]: With dead ends: 12 [2021-10-24 10:56:57,510 INFO L226 Difference]: Without dead ends: 9 [2021-10-24 10:56:57,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:56:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-24 10:56:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-24 10:56:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-10-24 10:56:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-24 10:56:57,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-24 10:56:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:56:57,515 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-24 10:56:57,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-10-24 10:56:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-24 10:56:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:56:57,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:56:57,517 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-24 10:56:57,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:56:57,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:56:57,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:56:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:56:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1872095098, now seen corresponding path program 2 times [2021-10-24 10:56:57,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:56:57,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138352958] [2021-10-24 10:56:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:56:57,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:56:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:56:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:57,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:56:57,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138352958] [2021-10-24 10:56:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138352958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:56:57,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946291536] [2021-10-24 10:56:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:56:57,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:56:57,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:56:57,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:56:57,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:56:57,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-24 10:56:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:56:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:56:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:56:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:57,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:56:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:58,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946291536] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:56:58,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789151155] [2021-10-24 10:56:58,010 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-24 10:56:58,011 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:56:58,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:56:58,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:56:58,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:56:58,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,024 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:58,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:56:58,028 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:58,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:56:58,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-24 10:56:58,043 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-10-24 10:56:58,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:58,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:56:58,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:58,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:58,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:58,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:58,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2021-10-24 10:56:58,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:58,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:58,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:58,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:56:58,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:56:58,116 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:92, output treesize:77 [2021-10-24 10:56:58,122 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.7 percent of original size [2021-10-24 10:56:58,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-10-24 10:56:58,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:58,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-10-24 10:56:58,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:58,269 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-10-24 10:56:58,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-24 10:56:58,278 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:56:58,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:56:58,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:56:58,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-10-24 10:56:58,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613559799] [2021-10-24 10:56:58,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:56:58,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:56:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:56:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:56:58,466 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-24 10:56:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:56:58,483 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-24 10:56:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:56:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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 [2021-10-24 10:56:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:56:58,485 INFO L225 Difference]: With dead ends: 16 [2021-10-24 10:56:58,485 INFO L226 Difference]: Without dead ends: 13 [2021-10-24 10:56:58,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:56:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-24 10:56:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-24 10:56:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) [2021-10-24 10:56:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-24 10:56:58,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-10-24 10:56:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:56:58,489 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-24 10:56:58,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-24 10:56:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-24 10:56:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:56:58,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:56:58,490 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-10-24 10:56:58,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:56:58,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-24 10:56:58,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:56:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:56:58,711 INFO L82 PathProgramCache]: Analyzing trace with hash -457719802, now seen corresponding path program 3 times [2021-10-24 10:56:58,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:56:58,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052750601] [2021-10-24 10:56:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:56:58,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:56:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:56:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:58,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:56:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052750601] [2021-10-24 10:56:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052750601] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:56:58,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44732349] [2021-10-24 10:56:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 10:56:58,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:56:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:56:58,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:56:58,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:56:58,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 10:56:58,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:56:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-24 10:56:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:56:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:59,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:56:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:56:59,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44732349] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:56:59,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795828836] [2021-10-24 10:56:59,396 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-24 10:56:59,396 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:56:59,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:56:59,397 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:56:59,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:56:59,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,405 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:59,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:56:59,410 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:56:59,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:56:59,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-24 10:56:59,419 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-10-24 10:56:59,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:59,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:56:59,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:59,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:56:59,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:59,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:56:59,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2021-10-24 10:56:59,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:59,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,456 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:56:59,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:56:59,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:56:59,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:56:59,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:92, output treesize:77 [2021-10-24 10:56:59,466 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.7 percent of original size [2021-10-24 10:56:59,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:56:59,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:56:59,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-10-24 10:56:59,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:56:59,541 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-10-24 10:56:59,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-24 10:56:59,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:56:59,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:56:59,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:56:59,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-10-24 10:56:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928278166] [2021-10-24 10:56:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-24 10:56:59,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:56:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-24 10:56:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-10-24 10:56:59,772 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-10-24 10:56:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:56:59,909 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-24 10:56:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 10:56:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 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 [2021-10-24 10:56:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:56:59,910 INFO L225 Difference]: With dead ends: 17 [2021-10-24 10:56:59,911 INFO L226 Difference]: Without dead ends: 14 [2021-10-24 10:56:59,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-10-24 10:56:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-24 10:56:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-24 10:56:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:56:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-24 10:56:59,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-10-24 10:56:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:56:59,914 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-24 10:56:59,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-10-24 10:56:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-24 10:56:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:56:59,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:56:59,915 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2021-10-24 10:56:59,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:57:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-24 10:57:00,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:57:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:57:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1304516764, now seen corresponding path program 4 times [2021-10-24 10:57:00,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:57:00,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694921154] [2021-10-24 10:57:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:57:00,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:57:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:57:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:57:00,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:57:00,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694921154] [2021-10-24 10:57:00,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694921154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:57:00,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836613735] [2021-10-24 10:57:00,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 10:57:00,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:57:00,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:57:00,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:57:00,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:57:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:57:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:57:00,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:57:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:57:00,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:57:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:57:00,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836613735] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:57:00,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:57:00,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [10] total 11 [2021-10-24 10:57:00,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960232274] [2021-10-24 10:57:00,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:57:00,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:57:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:57:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:57:00,406 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 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) [2021-10-24 10:57:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:57:00,424 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-24 10:57:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:57:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 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 [2021-10-24 10:57:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:57:00,425 INFO L225 Difference]: With dead ends: 14 [2021-10-24 10:57:00,425 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:57:00,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:57:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:57:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:57:00,426 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) [2021-10-24 10:57:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:57:00,426 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-24 10:57:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:57:00,426 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:57:00,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 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) [2021-10-24 10:57:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:57:00,427 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:57:00,429 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:57:00,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:57:00,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-24 10:57:00,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:57:00,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:57:00,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:57:00,775 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:57:00,775 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-24 10:57:00,775 INFO L860 garLoopResultBuilder]: At program point L15-2(lines 1 28) the Hoare annotation is: true [2021-10-24 10:57:00,775 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:57:00,776 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-24 10:57:00,776 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~sn~0 0)) (and (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 5) (<= 8 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 8)) (and (<= 2 ULTIMATE.start_main_~i~0) (<= 2 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~sn~0 2)) (and (<= ULTIMATE.start_main_~sn~0 4) (<= 3 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 3)) (and (< 15 ULTIMATE.start_main_~sn~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~sn~0 16)) (and (<= ULTIMATE.start_main_~i~0 7) (<= ULTIMATE.start_main_~sn~0 12) (<= 7 ULTIMATE.start_main_~i~0) (<= 12 ULTIMATE.start_main_~sn~0)) (and (<= ULTIMATE.start_main_~sn~0 10) (<= 6 ULTIMATE.start_main_~i~0) (<= 10 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 6)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 8) (<= ULTIMATE.start_main_~sn~0 14) (<= 14 ULTIMATE.start_main_~sn~0)) (and (<= 4 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 4) (<= 6 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 6))) [2021-10-24 10:57:00,776 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-24 10:57:00,780 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:57:00,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:57:00 BoogieIcfgContainer [2021-10-24 10:57:00,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:57:00,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:57:00,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:57:00,795 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:57:00,795 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:56:56" (3/4) ... [2021-10-24 10:57:00,804 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:57:00,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-24 10:57:00,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-24 10:57:00,818 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:57:00,818 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:57:00,845 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:57:00,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:57:00,846 INFO L168 Benchmark]: Toolchain (without parser) took 5453.07 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 65.3 MB in the beginning and 84.7 MB in the end (delta: -19.3 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,846 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:57:00,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.29 ms. Allocated memory is still 94.4 MB. Free memory was 65.1 MB in the beginning and 55.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.15 ms. Allocated memory is still 94.4 MB. Free memory was 55.8 MB in the beginning and 54.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,847 INFO L168 Benchmark]: Boogie Preprocessor took 19.66 ms. Allocated memory is still 94.4 MB. Free memory was 54.4 MB in the beginning and 53.5 MB in the end (delta: 871.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:57:00,848 INFO L168 Benchmark]: RCFGBuilder took 362.61 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 53.4 MB in the beginning and 90.1 MB in the end (delta: -36.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,848 INFO L168 Benchmark]: TraceAbstraction took 4790.14 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 89.6 MB in the beginning and 86.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,849 INFO L168 Benchmark]: Witness Printer took 50.39 ms. Allocated memory is still 140.5 MB. Free memory was 86.8 MB in the beginning and 84.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:57:00,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 189.29 ms. Allocated memory is still 94.4 MB. Free memory was 65.1 MB in the beginning and 55.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.15 ms. Allocated memory is still 94.4 MB. Free memory was 55.8 MB in the beginning and 54.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.66 ms. Allocated memory is still 94.4 MB. Free memory was 54.4 MB in the beginning and 53.5 MB in the end (delta: 871.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 362.61 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 53.4 MB in the beginning and 90.1 MB in the end (delta: -36.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4790.14 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 89.6 MB in the beginning and 86.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. * Witness Printer took 50.39 ms. Allocated memory is still 140.5 MB. Free memory was 86.8 MB in the beginning and 84.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: 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 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4657.4ms, OverallIterations: 5, TraceHistogramMax: 9, EmptinessCheckTime: 9.9ms, AutomataDifference: 283.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 120.0ms, InitialAbstractionConstructionTime: 35.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18 SDtfs, 1 SDslu, 48 SDs, 0 SdLazy, 217 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 131.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1060.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 12 NumberOfFragments, 110 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 12.7ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 102.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 40.9ms SsaConstructionTime, 146.2ms SatisfiabilityAnalysisTime, 1193.7ms InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 380 SizeOfPredicates, 2 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 127/276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((i == 1 && sn == 0) || (((5 <= i && i <= 5) && 8 <= sn) && sn <= 8)) || (((2 <= i && 2 <= sn) && i <= 2) && sn <= 2)) || (((sn <= 4 && 3 <= i) && 4 <= sn) && i <= 3)) || ((15 < sn && 9 <= i) && sn <= 16)) || (((i <= 7 && sn <= 12) && 7 <= i) && 12 <= sn)) || (((sn <= 10 && 6 <= i) && 10 <= sn) && i <= 6)) || (((8 <= i && i <= 8) && sn <= 14) && 14 <= sn)) || (((4 <= i && i <= 4) && 6 <= sn) && sn <= 6) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-24 10:57:00,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4b9fd-936f-44de-a3d6-29316099e000/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...