./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8 --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 0675521d022a764ecdc1621f141761ef94d4be70 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:38:27,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:38:27,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:38:27,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:38:27,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:38:27,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:38:27,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:38:27,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:38:27,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:38:27,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:38:27,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:38:27,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:38:27,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:38:27,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:38:27,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:38:27,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:38:27,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:38:27,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:38:27,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:38:27,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:38:27,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:38:27,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:38:27,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:38:27,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:38:27,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:38:27,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:38:27,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:38:27,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:38:27,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:38:27,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:38:27,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:38:27,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:38:27,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:38:27,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:38:27,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:38:27,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:38:27,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:38:27,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:38:27,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:38:27,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:38:27,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:38:27,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:38:27,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:38:27,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:38:27,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:38:27,495 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:38:27,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:38:27,496 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:38:27,496 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:38:27,496 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:38:27,497 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:38:27,497 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:38:27,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:38:27,506 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:38:27,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:38:27,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:38:27,507 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:38:27,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:38:27,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:38:27,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:38:27,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:38:27,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:38:27,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:38:27,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:38:27,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:38:27,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:38:27,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:38:27,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:38:27,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:38:27,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:38:27,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:38:27,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:38:27,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:27,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:38:27,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:38:27,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:38:27,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:38:27,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:38:27,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:38:27,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:38:27,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:38:27,517 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_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0675521d022a764ecdc1621f141761ef94d4be70 [2021-10-13 07:38:27,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:38:27,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:38:27,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:38:27,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:38:27,916 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:38:27,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/eca-rers2012/Problem01_label17.c [2021-10-13 07:38:28,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/data/b424d8369/db5612ad74d84afba33a04ff2f171d2e/FLAG631828df6 [2021-10-13 07:38:28,803 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:38:28,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/sv-benchmarks/c/eca-rers2012/Problem01_label17.c [2021-10-13 07:38:28,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/data/b424d8369/db5612ad74d84afba33a04ff2f171d2e/FLAG631828df6 [2021-10-13 07:38:29,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/data/b424d8369/db5612ad74d84afba33a04ff2f171d2e [2021-10-13 07:38:29,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:38:29,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:38:29,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:29,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:38:29,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:38:29,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:29,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45538982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29, skipping insertion in model container [2021-10-13 07:38:29,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:29,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:38:29,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:38:29,612 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_de59bedc-c51e-496b-9291-d930b975182c/sv-benchmarks/c/eca-rers2012/Problem01_label17.c[19973,19986] [2021-10-13 07:38:29,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:29,683 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:38:29,846 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_de59bedc-c51e-496b-9291-d930b975182c/sv-benchmarks/c/eca-rers2012/Problem01_label17.c[19973,19986] [2021-10-13 07:38:29,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:29,885 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:38:29,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29 WrapperNode [2021-10-13 07:38:29,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:29,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:29,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:38:29,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:38:29,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:29,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:29,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:29,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:38:29,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:38:29,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:38:29,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:29,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:38:30,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:38:30,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:38:30,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:38:30,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (1/1) ... [2021-10-13 07:38:30,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:30,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:38:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:38:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:38:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:38:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:38:30,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:38:32,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:38:32,530 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:38:32,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:32 BoogieIcfgContainer [2021-10-13 07:38:32,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:38:32,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:38:32,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:38:32,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:38:32,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:38:29" (1/3) ... [2021-10-13 07:38:32,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7492e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:32, skipping insertion in model container [2021-10-13 07:38:32,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:29" (2/3) ... [2021-10-13 07:38:32,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7492e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:32, skipping insertion in model container [2021-10-13 07:38:32,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:32" (3/3) ... [2021-10-13 07:38:32,546 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2021-10-13 07:38:32,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:38:32,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:38:32,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:38:32,650 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, mConcurrency=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 [2021-10-13 07:38:32,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:38:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-13 07:38:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 07:38:32,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:32,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:32,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 379026055, now seen corresponding path program 1 times [2021-10-13 07:38:32,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:32,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018865228] [2021-10-13 07:38:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:32,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:38:33,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:33,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018865228] [2021-10-13 07:38:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018865228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:33,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:33,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866498972] [2021-10-13 07:38:33,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:33,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:33,186 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-13 07:38:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:33,742 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-13 07:38:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2021-10-13 07:38:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:33,759 INFO L225 Difference]: With dead ends: 224 [2021-10-13 07:38:33,760 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 07:38:33,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 07:38:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-13 07:38:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7569444444444444) internal successors, (253), 144 states have internal predecessors, (253), 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) [2021-10-13 07:38:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2021-10-13 07:38:33,822 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2021-10-13 07:38:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:33,823 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2021-10-13 07:38:33,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-13 07:38:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2021-10-13 07:38:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:38:33,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:33,831 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:33,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:38:33,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1189482305, now seen corresponding path program 1 times [2021-10-13 07:38:33,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:33,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464456484] [2021-10-13 07:38:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:33,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:34,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:34,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464456484] [2021-10-13 07:38:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464456484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:34,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:34,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:34,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359955848] [2021-10-13 07:38:34,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:34,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:34,050 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:34,509 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2021-10-13 07:38:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-13 07:38:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:34,514 INFO L225 Difference]: With dead ends: 431 [2021-10-13 07:38:34,514 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 07:38:34,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 07:38:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-13 07:38:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 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) [2021-10-13 07:38:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-13 07:38:34,542 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2021-10-13 07:38:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:34,543 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-13 07:38:34,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-13 07:38:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 07:38:34,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:34,549 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:38:34,550 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825035, now seen corresponding path program 1 times [2021-10-13 07:38:34,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:34,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586290765] [2021-10-13 07:38:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:34,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:38:34,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586290765] [2021-10-13 07:38:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586290765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:34,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793659494] [2021-10-13 07:38:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:34,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:34,668 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-13 07:38:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:35,120 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-13 07:38:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 105 [2021-10-13 07:38:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:35,126 INFO L225 Difference]: With dead ends: 715 [2021-10-13 07:38:35,126 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 07:38:35,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 07:38:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-13 07:38:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 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) [2021-10-13 07:38:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-13 07:38:35,187 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-13 07:38:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:35,190 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-13 07:38:35,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-13 07:38:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-13 07:38:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-13 07:38:35,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:35,203 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:35,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:38:35,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 218746559, now seen corresponding path program 1 times [2021-10-13 07:38:35,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:35,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255900488] [2021-10-13 07:38:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:35,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 07:38:35,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:35,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255900488] [2021-10-13 07:38:35,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255900488] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:35,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:35,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483743888] [2021-10-13 07:38:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:35,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:35,312 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-13 07:38:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:35,670 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-13 07:38:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 109 [2021-10-13 07:38:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:35,674 INFO L225 Difference]: With dead ends: 715 [2021-10-13 07:38:35,674 INFO L226 Difference]: Without dead ends: 358 [2021-10-13 07:38:35,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-13 07:38:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-13 07:38:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2021-10-13 07:38:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-13 07:38:35,691 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-13 07:38:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-13 07:38:35,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-13 07:38:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-13 07:38:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-13 07:38:35,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:35,695 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:35,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:38:35,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash 674880247, now seen corresponding path program 1 times [2021-10-13 07:38:35,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:35,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509800504] [2021-10-13 07:38:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:35,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:38:35,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:35,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509800504] [2021-10-13 07:38:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509800504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:35,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099890946] [2021-10-13 07:38:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:35,771 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-13 07:38:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:36,195 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-13 07:38:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 113 [2021-10-13 07:38:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:36,200 INFO L225 Difference]: With dead ends: 857 [2021-10-13 07:38:36,200 INFO L226 Difference]: Without dead ends: 500 [2021-10-13 07:38:36,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-13 07:38:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-13 07:38:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 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) [2021-10-13 07:38:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-13 07:38:36,221 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-13 07:38:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-13 07:38:36,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-13 07:38:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-13 07:38:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 07:38:36,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:36,225 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:36,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:38:36,226 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:36,226 INFO L82 PathProgramCache]: Analyzing trace with hash -692381003, now seen corresponding path program 1 times [2021-10-13 07:38:36,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:36,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559048025] [2021-10-13 07:38:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:36,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 07:38:36,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:36,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559048025] [2021-10-13 07:38:36,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559048025] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:36,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:36,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:38:36,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599661865] [2021-10-13 07:38:36,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:36,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:36,331 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-13 07:38:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:36,766 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-13 07:38:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 122 [2021-10-13 07:38:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:36,774 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 07:38:36,774 INFO L226 Difference]: Without dead ends: 855 [2021-10-13 07:38:36,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-13 07:38:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-13 07:38:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 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) [2021-10-13 07:38:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-13 07:38:36,803 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-13 07:38:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:36,804 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-13 07:38:36,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-13 07:38:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-13 07:38:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-13 07:38:36,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:36,807 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:36,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:38:36,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 240375483, now seen corresponding path program 1 times [2021-10-13 07:38:36,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:36,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21326070] [2021-10-13 07:38:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:36,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 07:38:36,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:36,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21326070] [2021-10-13 07:38:36,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21326070] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:36,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:36,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:38:36,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300742464] [2021-10-13 07:38:36,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:36,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:36,883 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-13 07:38:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:37,272 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-13 07:38:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 138 [2021-10-13 07:38:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:37,279 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 07:38:37,279 INFO L226 Difference]: Without dead ends: 713 [2021-10-13 07:38:37,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-13 07:38:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-13 07:38:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 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) [2021-10-13 07:38:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-13 07:38:37,312 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-13 07:38:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-13 07:38:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-13 07:38:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-13 07:38:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-13 07:38:37,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:37,320 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:37,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:38:37,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1229086565, now seen corresponding path program 1 times [2021-10-13 07:38:37,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:37,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973548046] [2021-10-13 07:38:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:37,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 07:38:37,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:37,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973548046] [2021-10-13 07:38:37,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973548046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:37,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:37,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:38:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019933842] [2021-10-13 07:38:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:38:37,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:38:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:37,473 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-13 07:38:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:38,123 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-13 07:38:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:38:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 154 [2021-10-13 07:38:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:38,133 INFO L225 Difference]: With dead ends: 1780 [2021-10-13 07:38:38,133 INFO L226 Difference]: Without dead ends: 997 [2021-10-13 07:38:38,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-13 07:38:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-13 07:38:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2359437751004017) internal successors, (1231), 996 states have internal predecessors, (1231), 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) [2021-10-13 07:38:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1231 transitions. [2021-10-13 07:38:38,168 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1231 transitions. Word has length 154 [2021-10-13 07:38:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:38,170 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1231 transitions. [2021-10-13 07:38:38,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-13 07:38:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1231 transitions. [2021-10-13 07:38:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-13 07:38:38,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:38,175 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:38,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:38:38,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2145597240, now seen corresponding path program 1 times [2021-10-13 07:38:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:38,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140412412] [2021-10-13 07:38:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:38,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:38:38,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:38,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140412412] [2021-10-13 07:38:38,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140412412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:38,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:38,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:38:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6448184] [2021-10-13 07:38:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:38:38,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:38:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:38,310 INFO L87 Difference]: Start difference. First operand 997 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-13 07:38:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:38,864 INFO L93 Difference]: Finished difference Result 2206 states and 2715 transitions. [2021-10-13 07:38:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:38:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 171 [2021-10-13 07:38:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:38,873 INFO L225 Difference]: With dead ends: 2206 [2021-10-13 07:38:38,873 INFO L226 Difference]: Without dead ends: 1210 [2021-10-13 07:38:38,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-13 07:38:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-13 07:38:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1927710843373494) internal successors, (1188), 996 states have internal predecessors, (1188), 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) [2021-10-13 07:38:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1188 transitions. [2021-10-13 07:38:38,908 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1188 transitions. Word has length 171 [2021-10-13 07:38:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:38,908 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1188 transitions. [2021-10-13 07:38:38,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-13 07:38:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1188 transitions. [2021-10-13 07:38:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-13 07:38:38,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:38,913 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:38,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:38:38,914 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1532629065, now seen corresponding path program 1 times [2021-10-13 07:38:38,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:38,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602562850] [2021-10-13 07:38:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:38,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:38:39,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602562850] [2021-10-13 07:38:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602562850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:38:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791023152] [2021-10-13 07:38:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:39,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:39,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:39,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:38:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:38:39,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 07:38:40,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 07:38:41,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791023152] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:41,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:38:41,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-10-13 07:38:41,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110317237] [2021-10-13 07:38:41,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:41,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:38:41,040 INFO L87 Difference]: Start difference. First operand 997 states and 1188 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-10-13 07:38:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:41,369 INFO L93 Difference]: Finished difference Result 1709 states and 2015 transitions. [2021-10-13 07:38:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 175 [2021-10-13 07:38:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:41,382 INFO L225 Difference]: With dead ends: 1709 [2021-10-13 07:38:41,382 INFO L226 Difference]: Without dead ends: 1707 [2021-10-13 07:38:41,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:38:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-13 07:38:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-13 07:38:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.1796675191815857) internal successors, (1845), 1564 states have internal predecessors, (1845), 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) [2021-10-13 07:38:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1845 transitions. [2021-10-13 07:38:41,453 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1845 transitions. Word has length 175 [2021-10-13 07:38:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:41,454 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1845 transitions. [2021-10-13 07:38:41,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-10-13 07:38:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1845 transitions. [2021-10-13 07:38:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-13 07:38:41,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:41,462 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:41,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:41,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 07:38:41,676 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1287882040, now seen corresponding path program 1 times [2021-10-13 07:38:41,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:41,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879795014] [2021-10-13 07:38:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:41,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-13 07:38:41,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:41,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879795014] [2021-10-13 07:38:41,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879795014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:41,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:41,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:38:41,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91951177] [2021-10-13 07:38:41,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:38:41,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:41,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:38:41,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:41,758 INFO L87 Difference]: Start difference. First operand 1565 states and 1845 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:42,255 INFO L93 Difference]: Finished difference Result 3200 states and 3779 transitions. [2021-10-13 07:38:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:38:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-10-13 07:38:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:42,267 INFO L225 Difference]: With dead ends: 3200 [2021-10-13 07:38:42,268 INFO L226 Difference]: Without dead ends: 1636 [2021-10-13 07:38:42,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-13 07:38:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-13 07:38:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.165137614678899) internal successors, (1905), 1635 states have internal predecessors, (1905), 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) [2021-10-13 07:38:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1905 transitions. [2021-10-13 07:38:42,322 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1905 transitions. Word has length 202 [2021-10-13 07:38:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1905 transitions. [2021-10-13 07:38:42,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1905 transitions. [2021-10-13 07:38:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-13 07:38:42,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:42,330 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:42,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:38:42,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash 853603705, now seen corresponding path program 1 times [2021-10-13 07:38:42,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:42,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355620702] [2021-10-13 07:38:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:42,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-13 07:38:42,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:42,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355620702] [2021-10-13 07:38:42,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355620702] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:42,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:42,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:38:42,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970241325] [2021-10-13 07:38:42,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:42,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:42,444 INFO L87 Difference]: Start difference. First operand 1636 states and 1905 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-13 07:38:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:42,842 INFO L93 Difference]: Finished difference Result 3555 states and 4142 transitions. [2021-10-13 07:38:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 220 [2021-10-13 07:38:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:42,855 INFO L225 Difference]: With dead ends: 3555 [2021-10-13 07:38:42,856 INFO L226 Difference]: Without dead ends: 1920 [2021-10-13 07:38:42,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-13 07:38:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1849. [2021-10-13 07:38:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 1.1466450216450217) internal successors, (2119), 1848 states have internal predecessors, (2119), 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) [2021-10-13 07:38:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2119 transitions. [2021-10-13 07:38:42,916 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2119 transitions. Word has length 220 [2021-10-13 07:38:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2119 transitions. [2021-10-13 07:38:42,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-13 07:38:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2119 transitions. [2021-10-13 07:38:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-13 07:38:42,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:42,925 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:42,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:38:42,925 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2121153666, now seen corresponding path program 1 times [2021-10-13 07:38:42,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:42,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866096469] [2021-10-13 07:38:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:42,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-13 07:38:43,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:43,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866096469] [2021-10-13 07:38:43,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866096469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:43,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:38:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682302100] [2021-10-13 07:38:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:43,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:43,077 INFO L87 Difference]: Start difference. First operand 1849 states and 2119 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-13 07:38:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:43,429 INFO L93 Difference]: Finished difference Result 3981 states and 4546 transitions. [2021-10-13 07:38:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 242 [2021-10-13 07:38:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:43,443 INFO L225 Difference]: With dead ends: 3981 [2021-10-13 07:38:43,443 INFO L226 Difference]: Without dead ends: 1849 [2021-10-13 07:38:43,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-13 07:38:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1210. [2021-10-13 07:38:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.1339950372208436) internal successors, (1371), 1209 states have internal predecessors, (1371), 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) [2021-10-13 07:38:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1371 transitions. [2021-10-13 07:38:43,513 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1371 transitions. Word has length 242 [2021-10-13 07:38:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:43,514 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1371 transitions. [2021-10-13 07:38:43,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-13 07:38:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1371 transitions. [2021-10-13 07:38:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-13 07:38:43,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:43,521 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:43,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 07:38:43,522 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1886816303, now seen corresponding path program 1 times [2021-10-13 07:38:43,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:43,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576587687] [2021-10-13 07:38:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:43,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-13 07:38:43,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:43,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576587687] [2021-10-13 07:38:43,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576587687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:38:43,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836392046] [2021-10-13 07:38:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:43,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:43,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:43,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:43,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:38:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:38:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 07:38:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 07:38:45,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836392046] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:45,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:38:45,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-13 07:38:45,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359731596] [2021-10-13 07:38:45,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:45,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:38:45,675 INFO L87 Difference]: Start difference. First operand 1210 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-13 07:38:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:46,024 INFO L93 Difference]: Finished difference Result 2348 states and 2667 transitions. [2021-10-13 07:38:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 255 [2021-10-13 07:38:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:46,033 INFO L225 Difference]: With dead ends: 2348 [2021-10-13 07:38:46,033 INFO L226 Difference]: Without dead ends: 1210 [2021-10-13 07:38:46,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:38:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-13 07:38:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2021-10-13 07:38:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.1246485473289598) internal successors, (1200), 1067 states have internal predecessors, (1200), 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) [2021-10-13 07:38:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1200 transitions. [2021-10-13 07:38:46,072 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1200 transitions. Word has length 255 [2021-10-13 07:38:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:46,073 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1200 transitions. [2021-10-13 07:38:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-13 07:38:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1200 transitions. [2021-10-13 07:38:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-13 07:38:46,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:46,080 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:46,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:46,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 07:38:46,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1810003544, now seen corresponding path program 1 times [2021-10-13 07:38:46,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:46,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571797832] [2021-10-13 07:38:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:46,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 07:38:46,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571797832] [2021-10-13 07:38:46,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571797832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:38:46,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208126621] [2021-10-13 07:38:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:46,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:46,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:46,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:38:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:38:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-13 07:38:47,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-13 07:38:48,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208126621] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:48,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:38:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-10-13 07:38:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630737299] [2021-10-13 07:38:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:38:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:38:48,528 INFO L87 Difference]: Start difference. First operand 1068 states and 1200 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-13 07:38:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:48,849 INFO L93 Difference]: Finished difference Result 2062 states and 2324 transitions. [2021-10-13 07:38:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 263 [2021-10-13 07:38:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:48,851 INFO L225 Difference]: With dead ends: 2062 [2021-10-13 07:38:48,851 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:38:48,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:38:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:38:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:38:48,856 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) [2021-10-13 07:38:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:38:48,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2021-10-13 07:38:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:38:48,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-13 07:38:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:38:48,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:38:48,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:38:48,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:49,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:49,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:38:49,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:38:49,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:38:49,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:38:49,768 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-13 07:38:49,768 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-13 07:38:49,768 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L533-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L534(line 534) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-13 07:38:49,769 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-13 07:38:49,770 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-13 07:38:49,771 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-13 07:38:49,774 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-13 07:38:49,774 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-13 07:38:49,774 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-13 07:38:49,774 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-13 07:38:49,774 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-13 07:38:49,775 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-13 07:38:49,775 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-13 07:38:49,775 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-13 07:38:49,775 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:38:49,775 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-13 07:38:49,776 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-13 07:38:49,776 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-13 07:38:49,779 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse9 (= ~a20~0 1))) (let ((.cse3 (<= 15 ~a8~0)) (.cse0 (not .cse9)) (.cse4 (<= ~a8~0 13)) (.cse7 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse6 (<= ~a7~0 0)) (.cse1 (= ~a21~0 1)) (.cse2 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and (<= 6 ~a16~0) .cse1 .cse2 .cse3) (and .cse6 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse3) (and .cse4 .cse8 .cse9) (and .cse1 .cse2 .cse7 .cse9) (and .cse0 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse5) (and .cse8 .cse1 .cse9) (and .cse6 .cse1 .cse2 .cse9)))) [2021-10-13 07:38:49,779 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-13 07:38:49,779 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-13 07:38:49,779 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-13 07:38:49,780 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-13 07:38:49,780 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-13 07:38:49,780 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-13 07:38:49,780 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-13 07:38:49,781 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:38:49,781 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-13 07:38:49,781 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-13 07:38:49,781 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-13 07:38:49,781 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-13 07:38:49,781 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-13 07:38:49,782 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-13 07:38:49,783 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-13 07:38:49,783 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-13 07:38:49,783 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-13 07:38:49,783 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse9 (= ~a20~0 1))) (let ((.cse3 (<= 15 ~a8~0)) (.cse0 (not .cse9)) (.cse4 (<= ~a8~0 13)) (.cse7 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse6 (<= ~a7~0 0)) (.cse1 (= ~a21~0 1)) (.cse2 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and (<= 6 ~a16~0) .cse1 .cse2 .cse3) (and .cse6 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse3) (and .cse4 .cse8 .cse9) (and .cse1 .cse2 .cse7 .cse9) (and .cse0 .cse4 .cse1 .cse7) (and .cse8 .cse1 .cse5) (and .cse8 .cse1 .cse9) (and .cse6 .cse1 .cse2 .cse9)))) [2021-10-13 07:38:49,783 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 534) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point L530-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-13 07:38:49,784 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-13 07:38:49,785 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-13 07:38:49,785 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-13 07:38:49,790 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:38:49,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:38:49 BoogieIcfgContainer [2021-10-13 07:38:49,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:38:49,838 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:38:49,838 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:38:49,838 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:38:49,839 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:32" (3/4) ... [2021-10-13 07:38:49,847 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:38:49,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-13 07:38:49,883 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-13 07:38:49,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-13 07:38:49,887 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:38:50,058 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:38:50,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:38:50,060 INFO L168 Benchmark]: Toolchain (without parser) took 21026.41 ms. Allocated memory was 115.3 MB in the beginning and 264.2 MB in the end (delta: 148.9 MB). Free memory was 83.1 MB in the beginning and 78.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 153.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,061 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 115.3 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:38:50,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 851.61 ms. Allocated memory is still 115.3 MB. Free memory was 82.8 MB in the beginning and 72.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.13 ms. Allocated memory is still 115.3 MB. Free memory was 72.3 MB in the beginning and 66.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,062 INFO L168 Benchmark]: Boogie Preprocessor took 74.32 ms. Allocated memory is still 115.3 MB. Free memory was 66.8 MB in the beginning and 62.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,063 INFO L168 Benchmark]: RCFGBuilder took 2472.50 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 62.2 MB in the beginning and 81.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,063 INFO L168 Benchmark]: TraceAbstraction took 17300.63 ms. Allocated memory was 138.4 MB in the beginning and 264.2 MB in the end (delta: 125.8 MB). Free memory was 81.5 MB in the beginning and 93.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 117.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,064 INFO L168 Benchmark]: Witness Printer took 220.66 ms. Allocated memory is still 264.2 MB. Free memory was 93.5 MB in the beginning and 78.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:50,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 115.3 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 851.61 ms. Allocated memory is still 115.3 MB. Free memory was 82.8 MB in the beginning and 72.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 98.13 ms. Allocated memory is still 115.3 MB. Free memory was 72.3 MB in the beginning and 66.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.32 ms. Allocated memory is still 115.3 MB. Free memory was 66.8 MB in the beginning and 62.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2472.50 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 62.2 MB in the beginning and 81.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17300.63 ms. Allocated memory was 138.4 MB in the beginning and 264.2 MB in the end (delta: 125.8 MB). Free memory was 81.5 MB in the beginning and 93.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 117.0 MB. Max. memory is 16.1 GB. * Witness Printer took 220.66 ms. Allocated memory is still 264.2 MB. Free memory was 93.5 MB in the beginning and 78.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 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: 534]: 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, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17155.2ms, OverallIterations: 15, TraceHistogramMax: 7, EmptinessCheckTime: 96.0ms, AutomataDifference: 6762.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 687.6ms, InitialAbstractionConstructionTime: 19.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 674 SDtfs, 904 SDslu, 65 SDs, 0 SdLazy, 3405 SolverSat, 842 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4647.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1428 GetRequests, 1395 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 201.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=12, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 560.0ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1491 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 263 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3288 FormulaSimplificationTreeSizeReduction, 106.9ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 298 FormulaSimplificationTreeSizeReductionInter, 570.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 263.1ms SsaConstructionTime, 785.9ms SatisfiabilityAnalysisTime, 6270.4ms InterpolantComputationTime, 3108 NumberOfCodeBlocks, 3108 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 3780 ConstructedInterpolants, 0 QuantifiedInterpolants, 13074 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 21 InterpolantComputations, 18 PerfectInterpolantSequences, 4329/4634 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: 593]: Loop Invariant Derived loop invariant: ((((((((((((!(a20 == 1) && a21 == 1) && a17 == 1) && 15 <= a8) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || (((6 <= a16 && a21 == 1) && a17 == 1) && 15 <= a8)) || (((a7 <= 0 && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((!(a20 == 1) && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((((!(a20 == 1) && a21 == 1) && a17 == 1) && 15 <= a8) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || (((6 <= a16 && a21 == 1) && a17 == 1) && 15 <= a8)) || (((a7 <= 0 && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((!(a20 == 1) && a8 <= 13) && a21 == 1) && a16 <= 4)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:38:50,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de59bedc-c51e-496b-9291-d930b975182c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...