./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_14-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_14-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:30:16,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:30:16,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:30:16,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:30:16,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:30:16,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:30:16,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:30:16,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:30:16,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:30:16,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:30:16,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:30:16,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:30:16,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:30:16,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:30:16,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:30:16,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:30:16,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:30:16,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:30:16,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:30:16,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:30:16,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:30:16,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:30:16,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:30:16,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:30:16,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:30:16,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:30:16,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:30:16,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:30:16,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:30:16,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:30:16,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:30:16,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:30:16,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:30:16,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:30:16,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:30:16,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:30:16,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:30:16,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:30:16,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:30:16,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:30:16,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:30:16,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:30:16,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:30:16,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:30:16,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:30:16,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:30:16,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:30:16,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:30:16,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:30:16,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:30:16,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:30:16,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:30:16,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:30:16,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:30:16,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:30:16,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:30:16,452 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:30:16,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:30:16,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:30:16,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:30:16,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:30:16,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:30:16,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:30:16,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:30:16,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:30:16,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:30:16,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:30:16,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:30:16,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:30:16,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:30:16,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:30:16,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:30:16,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:30:16,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:30:16,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:30:16,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:30:16,457 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:30:16,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:30:16,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:30:16,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:30:16,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:30:16,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:30:16,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:30:16,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd [2022-11-23 14:30:16,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:30:16,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:30:16,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:30:16,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:30:16,762 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:30:16,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/locks/test_locks_14-1.c [2022-11-23 14:30:19,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:30:20,181 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:30:20,181 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/sv-benchmarks/c/locks/test_locks_14-1.c [2022-11-23 14:30:20,187 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/data/b838afe6c/b14d64262c82481fa6adae12ed7f11a0/FLAGd1a7f4c93 [2022-11-23 14:30:20,201 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/data/b838afe6c/b14d64262c82481fa6adae12ed7f11a0 [2022-11-23 14:30:20,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:30:20,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:30:20,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:30:20,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:30:20,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:30:20,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c3c4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20, skipping insertion in model container [2022-11-23 14:30:20,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:30:20,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:30:20,454 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2022-11-23 14:30:20,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:30:20,468 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:30:20,497 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2022-11-23 14:30:20,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:30:20,511 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:30:20,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20 WrapperNode [2022-11-23 14:30:20,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:30:20,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:30:20,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:30:20,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:30:20,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,564 INFO L138 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 182 [2022-11-23 14:30:20,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:30:20,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:30:20,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:30:20,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:30:20,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:30:20,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:30:20,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:30:20,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:30:20,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (1/1) ... [2022-11-23 14:30:20,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:30:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:30:20,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:30:20,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:30:20,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:30:20,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:30:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:30:20,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:30:20,807 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:30:20,809 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:30:21,121 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:30:21,328 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:30:21,328 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:30:21,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:21 BoogieIcfgContainer [2022-11-23 14:30:21,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:30:21,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:30:21,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:30:21,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:30:21,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:30:20" (1/3) ... [2022-11-23 14:30:21,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77443c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:21, skipping insertion in model container [2022-11-23 14:30:21,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:20" (2/3) ... [2022-11-23 14:30:21,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77443c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:21, skipping insertion in model container [2022-11-23 14:30:21,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:21" (3/3) ... [2022-11-23 14:30:21,341 INFO L112 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-11-23 14:30:21,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:30:21,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:30:21,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:30:21,419 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21d56598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:30:21,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:30:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:30:21,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:21,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:30:21,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash -96656291, now seen corresponding path program 1 times [2022-11-23 14:30:21,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:21,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411985979] [2022-11-23 14:30:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:21,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411985979] [2022-11-23 14:30:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411985979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:21,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:21,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112295508] [2022-11-23 14:30:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:21,844 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:21,905 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2022-11-23 14:30:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:30:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:21,918 INFO L225 Difference]: With dead ends: 74 [2022-11-23 14:30:21,919 INFO L226 Difference]: Without dead ends: 63 [2022-11-23 14:30:21,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:21,925 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:21,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 174 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-23 14:30:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2022-11-23 14:30:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 59 transitions. [2022-11-23 14:30:21,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 59 transitions. Word has length 6 [2022-11-23 14:30:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:21,975 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 59 transitions. [2022-11-23 14:30:21,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 59 transitions. [2022-11-23 14:30:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:30:21,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:21,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:21,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:30:21,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:21,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1298834327, now seen corresponding path program 1 times [2022-11-23 14:30:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:21,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89034] [2022-11-23 14:30:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:22,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:22,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89034] [2022-11-23 14:30:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:22,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350607334] [2022-11-23 14:30:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,181 INFO L87 Difference]: Start difference. First operand 33 states and 59 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:22,233 INFO L93 Difference]: Finished difference Result 63 states and 111 transitions. [2022-11-23 14:30:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:30:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:22,235 INFO L225 Difference]: With dead ends: 63 [2022-11-23 14:30:22,236 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 14:30:22,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,237 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:22,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 157 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 14:30:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2022-11-23 14:30:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 58 transitions. [2022-11-23 14:30:22,244 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 58 transitions. Word has length 7 [2022-11-23 14:30:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:22,245 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 58 transitions. [2022-11-23 14:30:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 58 transitions. [2022-11-23 14:30:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:30:22,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:22,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:30:22,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1609370866, now seen corresponding path program 1 times [2022-11-23 14:30:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:22,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62687757] [2022-11-23 14:30:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:22,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62687757] [2022-11-23 14:30:22,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62687757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:22,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:22,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140589548] [2022-11-23 14:30:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:22,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,345 INFO L87 Difference]: Start difference. First operand 33 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:22,403 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2022-11-23 14:30:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:30:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:22,407 INFO L225 Difference]: With dead ends: 61 [2022-11-23 14:30:22,407 INFO L226 Difference]: Without dead ends: 59 [2022-11-23 14:30:22,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,411 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 52 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:22,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 151 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-23 14:30:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2022-11-23 14:30:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 57 transitions. [2022-11-23 14:30:22,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 57 transitions. Word has length 8 [2022-11-23 14:30:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:22,426 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 57 transitions. [2022-11-23 14:30:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 57 transitions. [2022-11-23 14:30:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:30:22,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:22,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:30:22,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1648897972, now seen corresponding path program 1 times [2022-11-23 14:30:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:22,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345847083] [2022-11-23 14:30:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:22,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345847083] [2022-11-23 14:30:22,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345847083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:22,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:22,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145691232] [2022-11-23 14:30:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,560 INFO L87 Difference]: Start difference. First operand 33 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:22,596 INFO L93 Difference]: Finished difference Result 59 states and 101 transitions. [2022-11-23 14:30:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:30:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:22,601 INFO L225 Difference]: With dead ends: 59 [2022-11-23 14:30:22,601 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 14:30:22,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,612 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 50 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:22,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 14:30:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2022-11-23 14:30:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2022-11-23 14:30:22,628 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 9 [2022-11-23 14:30:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:22,628 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2022-11-23 14:30:22,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2022-11-23 14:30:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:30:22,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:22,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:30:22,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash 423983495, now seen corresponding path program 1 times [2022-11-23 14:30:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913380055] [2022-11-23 14:30:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:22,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:22,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913380055] [2022-11-23 14:30:22,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913380055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:22,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:22,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941820228] [2022-11-23 14:30:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,745 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:22,779 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2022-11-23 14:30:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:30:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:22,782 INFO L225 Difference]: With dead ends: 57 [2022-11-23 14:30:22,782 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 14:30:22,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,786 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:22,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 139 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 14:30:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-23 14:30:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 55 transitions. [2022-11-23 14:30:22,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 55 transitions. Word has length 10 [2022-11-23 14:30:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:22,793 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 55 transitions. [2022-11-23 14:30:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 55 transitions. [2022-11-23 14:30:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:30:22,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:22,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:30:22,794 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash 258799873, now seen corresponding path program 1 times [2022-11-23 14:30:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:22,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280482470] [2022-11-23 14:30:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:22,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:22,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280482470] [2022-11-23 14:30:22,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280482470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:22,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:22,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168882647] [2022-11-23 14:30:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:22,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,898 INFO L87 Difference]: Start difference. First operand 33 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:22,928 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2022-11-23 14:30:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:22,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:30:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:22,929 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:30:22,930 INFO L226 Difference]: Without dead ends: 53 [2022-11-23 14:30:22,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:22,932 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:22,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-23 14:30:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2022-11-23 14:30:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2022-11-23 14:30:22,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 11 [2022-11-23 14:30:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:22,942 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 54 transitions. [2022-11-23 14:30:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 54 transitions. [2022-11-23 14:30:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:30:22,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:22,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:30:22,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -566924772, now seen corresponding path program 1 times [2022-11-23 14:30:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102142646] [2022-11-23 14:30:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102142646] [2022-11-23 14:30:23,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102142646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357239859] [2022-11-23 14:30:23,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,041 INFO L87 Difference]: Start difference. First operand 33 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,065 INFO L93 Difference]: Finished difference Result 53 states and 86 transitions. [2022-11-23 14:30:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:30:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,066 INFO L225 Difference]: With dead ends: 53 [2022-11-23 14:30:23,066 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 14:30:23,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,067 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 128 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 14:30:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2022-11-23 14:30:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 53 transitions. [2022-11-23 14:30:23,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 53 transitions. Word has length 12 [2022-11-23 14:30:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 53 transitions. [2022-11-23 14:30:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 53 transitions. [2022-11-23 14:30:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:30:23,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:30:23,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash -394584650, now seen corresponding path program 1 times [2022-11-23 14:30:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777249302] [2022-11-23 14:30:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777249302] [2022-11-23 14:30:23,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777249302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487318644] [2022-11-23 14:30:23,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,159 INFO L87 Difference]: Start difference. First operand 33 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,177 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2022-11-23 14:30:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:30:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,179 INFO L225 Difference]: With dead ends: 51 [2022-11-23 14:30:23,179 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 14:30:23,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,180 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 42 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 122 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 14:30:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2022-11-23 14:30:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2022-11-23 14:30:23,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 13 [2022-11-23 14:30:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,196 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2022-11-23 14:30:23,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2022-11-23 14:30:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:30:23,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:30:23,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 652992177, now seen corresponding path program 1 times [2022-11-23 14:30:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936497229] [2022-11-23 14:30:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936497229] [2022-11-23 14:30:23,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936497229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303572494] [2022-11-23 14:30:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,280 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,300 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2022-11-23 14:30:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:30:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,301 INFO L225 Difference]: With dead ends: 49 [2022-11-23 14:30:23,302 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:30:23,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,304 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 115 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:30:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2022-11-23 14:30:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2022-11-23 14:30:23,312 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2022-11-23 14:30:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,312 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2022-11-23 14:30:23,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2022-11-23 14:30:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:30:23,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:30:23,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1231864213, now seen corresponding path program 1 times [2022-11-23 14:30:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378404911] [2022-11-23 14:30:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378404911] [2022-11-23 14:30:23,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378404911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304348983] [2022-11-23 14:30:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,386 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,412 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2022-11-23 14:30:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 14:30:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,413 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:30:23,413 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 14:30:23,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,415 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 110 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 14:30:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-11-23 14:30:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2022-11-23 14:30:23,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 15 [2022-11-23 14:30:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,427 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2022-11-23 14:30:23,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2022-11-23 14:30:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:30:23,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:30:23,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 467130182, now seen corresponding path program 1 times [2022-11-23 14:30:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3914644] [2022-11-23 14:30:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3914644] [2022-11-23 14:30:23,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3914644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437848387] [2022-11-23 14:30:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,501 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,541 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2022-11-23 14:30:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 14:30:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,542 INFO L225 Difference]: With dead ends: 45 [2022-11-23 14:30:23,542 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 14:30:23,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,543 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 14:30:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-23 14:30:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2022-11-23 14:30:23,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 16 [2022-11-23 14:30:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,546 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2022-11-23 14:30:23,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2022-11-23 14:30:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:30:23,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:30:23,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1596349216, now seen corresponding path program 1 times [2022-11-23 14:30:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331021417] [2022-11-23 14:30:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331021417] [2022-11-23 14:30:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331021417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852989145] [2022-11-23 14:30:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,614 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,633 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2022-11-23 14:30:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:30:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,635 INFO L225 Difference]: With dead ends: 43 [2022-11-23 14:30:23,635 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 14:30:23,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,636 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 14:30:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-11-23 14:30:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2022-11-23 14:30:23,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 17 [2022-11-23 14:30:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,647 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2022-11-23 14:30:23,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2022-11-23 14:30:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:30:23,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:30:23,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2052566053, now seen corresponding path program 1 times [2022-11-23 14:30:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601118640] [2022-11-23 14:30:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601118640] [2022-11-23 14:30:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601118640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906924799] [2022-11-23 14:30:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,719 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,743 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-23 14:30:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 14:30:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,745 INFO L225 Difference]: With dead ends: 41 [2022-11-23 14:30:23,745 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:30:23,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,747 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:30:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-23 14:30:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2022-11-23 14:30:23,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 18 [2022-11-23 14:30:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,752 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2022-11-23 14:30:23,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2022-11-23 14:30:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:30:23,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:30:23,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:30:23,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:30:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:30:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 795177941, now seen corresponding path program 1 times [2022-11-23 14:30:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:30:23,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355507578] [2022-11-23 14:30:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:23,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:30:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:23,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355507578] [2022-11-23 14:30:23,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355507578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:30:23,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:30:23,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:30:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306172242] [2022-11-23 14:30:23,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:30:23,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:30:23,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:30:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,806 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:30:23,823 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-23 14:30:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:30:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2022-11-23 14:30:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:30:23,824 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:30:23,824 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:30:23,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:30:23,825 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:30:23,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:30:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:30:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:30:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:30:23,826 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-11-23 14:30:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:30:23,826 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:30:23,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:30:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:30:23,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:30:23,830 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:30:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:30:23,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 14:30:23,841 INFO L902 garLoopResultBuilder]: At program point L217(lines 7 221) the Hoare annotation is: true [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point L151-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point L201-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point L152(line 152) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point L202(line 202) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L899 garLoopResultBuilder]: For program point L186-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,842 INFO L902 garLoopResultBuilder]: At program point L220(lines 6 221) the Hoare annotation is: true [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L187(line 187) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L55(lines 55 57) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L171-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L172(line 172) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L156-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L206-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point L140-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,843 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L157(line 157) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L207(line 207) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L191-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L192(line 192) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L176-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L177(line 177) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L161-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,844 INFO L902 garLoopResultBuilder]: At program point L211-1(lines 53 216) the Hoare annotation is: true [2022-11-23 14:30:23,844 INFO L899 garLoopResultBuilder]: For program point L162(line 162) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L212(line 212) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L895 garLoopResultBuilder]: At program point L212-1(lines 7 221) the Hoare annotation is: false [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L146-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L196-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L147(line 147) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L197(line 197) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2022-11-23 14:30:23,845 INFO L899 garLoopResultBuilder]: For program point L181-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,846 INFO L899 garLoopResultBuilder]: For program point L182(line 182) no Hoare annotation was computed. [2022-11-23 14:30:23,846 INFO L899 garLoopResultBuilder]: For program point L166-1(lines 53 216) no Hoare annotation was computed. [2022-11-23 14:30:23,846 INFO L899 garLoopResultBuilder]: For program point L167(line 167) no Hoare annotation was computed. [2022-11-23 14:30:23,849 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:30:23,851 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:30:23,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:30:23 BoogieIcfgContainer [2022-11-23 14:30:23,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:30:23,860 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:30:23,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:30:23,861 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:30:23,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:21" (3/4) ... [2022-11-23 14:30:23,864 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:30:23,875 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-23 14:30:23,876 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-23 14:30:23,876 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-23 14:30:23,876 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:30:23,932 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:30:23,932 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:30:23,933 INFO L158 Benchmark]: Toolchain (without parser) took 3727.84ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 102.7MB in the beginning and 61.7MB in the end (delta: 41.0MB). Peak memory consumption was 70.0MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,933 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:30:23,934 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.05ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 104.9MB in the end (delta: -2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,935 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.82ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 102.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,935 INFO L158 Benchmark]: Boogie Preprocessor took 27.08ms. Allocated memory is still 142.6MB. Free memory was 102.8MB in the beginning and 101.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,936 INFO L158 Benchmark]: RCFGBuilder took 738.06ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 71.9MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,936 INFO L158 Benchmark]: TraceAbstraction took 2526.41ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 71.3MB in the beginning and 65.9MB in the end (delta: 5.5MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,936 INFO L158 Benchmark]: Witness Printer took 71.78ms. Allocated memory is still 172.0MB. Free memory was 65.9MB in the beginning and 61.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:30:23,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.05ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 104.9MB in the end (delta: -2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.82ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 102.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.08ms. Allocated memory is still 142.6MB. Free memory was 102.8MB in the beginning and 101.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 738.06ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 71.9MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2526.41ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 71.3MB in the beginning and 65.9MB in the end (delta: 5.5MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * Witness Printer took 71.78ms. Allocated memory is still 172.0MB. Free memory was 65.9MB in the beginning and 61.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 219]: 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 604 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 604 mSDsluCounter, 1753 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1071 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 179 IncrementalHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 682 mSDtfsCounter, 179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 234 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 819 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-23 14:30:23,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381ec34b-f57c-40da-949a-5d5546649516/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE