./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --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 82bdcd0599c1cc352b3450b4e917b8a69eeb254589d3b948d4951dae1b33e3d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:09:35,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:09:35,601 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:09:35,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:09:35,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:09:35,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:09:35,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:09:35,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:09:35,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:09:35,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:09:35,634 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:09:35,634 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:09:35,635 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:09:35,635 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:09:35,636 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:09:35,636 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:09:35,637 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:09:35,637 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:09:35,638 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:09:35,638 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:09:35,639 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:09:35,640 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:09:35,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:09:35,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:09:35,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:09:35,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:09:35,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:09:35,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:09:35,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:09:35,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:09:35,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:09:35,645 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:09:35,645 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:09:35,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:09:35,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:09:35,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:09:35,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:09:35,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:09:35,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:35,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:09:35,648 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:09:35,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:09:35,649 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:09:35,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:09:35,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:09:35,650 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:09:35,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:09:35,651 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82bdcd0599c1cc352b3450b4e917b8a69eeb254589d3b948d4951dae1b33e3d4 [2024-11-09 01:09:35,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:09:35,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:09:35,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:09:35,939 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:09:35,940 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:09:35,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c Unable to find full path for "g++" [2024-11-09 01:09:38,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:09:38,480 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:09:38,481 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c [2024-11-09 01:09:38,503 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/data/88044dc71/fce22e22a4224c919ccee5226f7d999c/FLAG26214bd68 [2024-11-09 01:09:38,842 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/data/88044dc71/fce22e22a4224c919ccee5226f7d999c [2024-11-09 01:09:38,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:09:38,846 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:09:38,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:38,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:09:38,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:09:38,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:38" (1/1) ... [2024-11-09 01:09:38,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffe5306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:38, skipping insertion in model container [2024-11-09 01:09:38,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:38" (1/1) ... [2024-11-09 01:09:38,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:09:39,143 WARN L250 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_d3716544-adc5-45ca-976b-b503b76bcd62/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[913,926] [2024-11-09 01:09:39,219 WARN L250 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_d3716544-adc5-45ca-976b-b503b76bcd62/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[5977,5990] [2024-11-09 01:09:39,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:39,323 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:09:39,337 WARN L250 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_d3716544-adc5-45ca-976b-b503b76bcd62/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[913,926] [2024-11-09 01:09:39,361 WARN L250 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_d3716544-adc5-45ca-976b-b503b76bcd62/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-1.c[5977,5990] [2024-11-09 01:09:39,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:39,422 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:09:39,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39 WrapperNode [2024-11-09 01:09:39,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:39,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:39,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:09:39,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:09:39,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,517 INFO L138 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 592 [2024-11-09 01:09:39,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:39,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:09:39,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:09:39,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:09:39,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,545 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:09:39,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:09:39,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:09:39,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:09:39,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (1/1) ... [2024-11-09 01:09:39,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:39,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:39,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:09:39,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:09:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:09:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 01:09:39,653 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 01:09:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-09 01:09:39,653 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-09 01:09:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 01:09:39,654 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 01:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 01:09:39,654 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 01:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 01:09:39,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 01:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 01:09:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 01:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 01:09:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 01:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 01:09:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 01:09:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:09:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:09:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 01:09:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 01:09:39,768 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:09:39,770 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:09:40,486 INFO L? ?]: Removed 79 outVars from TransFormulas that were not future-live. [2024-11-09 01:09:40,486 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:09:40,846 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:09:40,850 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-09 01:09:40,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:40 BoogieIcfgContainer [2024-11-09 01:09:40,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:09:40,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:09:40,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:09:40,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:09:40,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:09:38" (1/3) ... [2024-11-09 01:09:40,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410bc9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:40, skipping insertion in model container [2024-11-09 01:09:40,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:39" (2/3) ... [2024-11-09 01:09:40,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410bc9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:40, skipping insertion in model container [2024-11-09 01:09:40,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:40" (3/3) ... [2024-11-09 01:09:40,861 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-1.c [2024-11-09 01:09:40,881 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:09:40,882 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 01:09:40,971 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:09:40,978 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6f5bd0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:09:40,979 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 01:09:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 125 states have internal predecessors, (182), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 01:09:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 01:09:41,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:41,001 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:41,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:41,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash 971949383, now seen corresponding path program 1 times [2024-11-09 01:09:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:41,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021444252] [2024-11-09 01:09:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:41,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021444252] [2024-11-09 01:09:41,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021444252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:41,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:41,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664613471] [2024-11-09 01:09:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:41,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:41,435 INFO L87 Difference]: Start difference. First operand has 156 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 125 states have internal predecessors, (182), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:41,672 INFO L93 Difference]: Finished difference Result 345 states and 508 transitions. [2024-11-09 01:09:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-09 01:09:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:41,695 INFO L225 Difference]: With dead ends: 345 [2024-11-09 01:09:41,695 INFO L226 Difference]: Without dead ends: 189 [2024-11-09 01:09:41,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:41,704 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 197 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:41,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 250 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:09:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-09 01:09:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2024-11-09 01:09:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 149 states have internal predecessors, (209), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 01:09:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 261 transitions. [2024-11-09 01:09:41,800 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 261 transitions. Word has length 28 [2024-11-09 01:09:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:41,801 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 261 transitions. [2024-11-09 01:09:41,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 261 transitions. [2024-11-09 01:09:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 01:09:41,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:41,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:41,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:09:41,806 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:41,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1246371446, now seen corresponding path program 1 times [2024-11-09 01:09:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:41,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771640199] [2024-11-09 01:09:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:41,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:41,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771640199] [2024-11-09 01:09:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771640199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:41,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:41,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422675572] [2024-11-09 01:09:41,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:41,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:41,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:41,935 INFO L87 Difference]: Start difference. First operand 185 states and 261 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:42,097 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2024-11-09 01:09:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-09 01:09:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:42,100 INFO L225 Difference]: With dead ends: 341 [2024-11-09 01:09:42,100 INFO L226 Difference]: Without dead ends: 260 [2024-11-09 01:09:42,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:42,107 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 195 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:42,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 234 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-09 01:09:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2024-11-09 01:09:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 206 states have (on average 1.4077669902912622) internal successors, (290), 209 states have internal predecessors, (290), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 01:09:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 356 transitions. [2024-11-09 01:09:42,145 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 356 transitions. Word has length 29 [2024-11-09 01:09:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:42,146 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 356 transitions. [2024-11-09 01:09:42,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 356 transitions. [2024-11-09 01:09:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 01:09:42,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:42,149 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:42,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:09:42,149 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:42,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1603631094, now seen corresponding path program 1 times [2024-11-09 01:09:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042240132] [2024-11-09 01:09:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:42,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042240132] [2024-11-09 01:09:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042240132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:42,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:42,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306980988] [2024-11-09 01:09:42,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:42,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:42,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:42,277 INFO L87 Difference]: Start difference. First operand 256 states and 356 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:42,462 INFO L93 Difference]: Finished difference Result 496 states and 684 transitions. [2024-11-09 01:09:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-09 01:09:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:42,466 INFO L225 Difference]: With dead ends: 496 [2024-11-09 01:09:42,466 INFO L226 Difference]: Without dead ends: 344 [2024-11-09 01:09:42,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:42,472 INFO L432 NwaCegarLoop]: 193 mSDtfsCounter, 46 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:42,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 359 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-09 01:09:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2024-11-09 01:09:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 269 states have (on average 1.3940520446096654) internal successors, (375), 274 states have internal predecessors, (375), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 01:09:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 453 transitions. [2024-11-09 01:09:42,528 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 453 transitions. Word has length 30 [2024-11-09 01:09:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:42,528 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 453 transitions. [2024-11-09 01:09:42,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:09:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 453 transitions. [2024-11-09 01:09:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 01:09:42,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:42,532 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:42,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:09:42,532 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:42,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1175065749, now seen corresponding path program 1 times [2024-11-09 01:09:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358557483] [2024-11-09 01:09:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:42,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358557483] [2024-11-09 01:09:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358557483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:42,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:42,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:09:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710294641] [2024-11-09 01:09:42,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:42,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:42,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:42,744 INFO L87 Difference]: Start difference. First operand 330 states and 453 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:09:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:43,081 INFO L93 Difference]: Finished difference Result 519 states and 738 transitions. [2024-11-09 01:09:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-09 01:09:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:43,087 INFO L225 Difference]: With dead ends: 519 [2024-11-09 01:09:43,087 INFO L226 Difference]: Without dead ends: 421 [2024-11-09 01:09:43,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:43,089 INFO L432 NwaCegarLoop]: 281 mSDtfsCounter, 316 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:43,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 486 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:09:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-09 01:09:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 420. [2024-11-09 01:09:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 339 states have (on average 1.3864306784660767) internal successors, (470), 345 states have internal predecessors, (470), 54 states have call successors, (54), 26 states have call predecessors, (54), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 01:09:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 576 transitions. [2024-11-09 01:09:43,126 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 576 transitions. Word has length 43 [2024-11-09 01:09:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:43,126 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 576 transitions. [2024-11-09 01:09:43,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:09:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 576 transitions. [2024-11-09 01:09:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 01:09:43,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:43,133 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:43,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 01:09:43,133 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:43,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1374243291, now seen corresponding path program 1 times [2024-11-09 01:09:43,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:43,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550246313] [2024-11-09 01:09:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:09:43,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:43,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550246313] [2024-11-09 01:09:43,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550246313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:43,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185317554] [2024-11-09 01:09:43,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:43,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:43,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:43,197 INFO L87 Difference]: Start difference. First operand 420 states and 576 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:43,311 INFO L93 Difference]: Finished difference Result 583 states and 794 transitions. [2024-11-09 01:09:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-09 01:09:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:43,315 INFO L225 Difference]: With dead ends: 583 [2024-11-09 01:09:43,315 INFO L226 Difference]: Without dead ends: 425 [2024-11-09 01:09:43,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:43,317 INFO L432 NwaCegarLoop]: 213 mSDtfsCounter, 32 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:43,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 391 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-09 01:09:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 414. [2024-11-09 01:09:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 333 states have (on average 1.3693693693693694) internal successors, (456), 339 states have internal predecessors, (456), 54 states have call successors, (54), 26 states have call predecessors, (54), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 01:09:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 562 transitions. [2024-11-09 01:09:43,367 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 562 transitions. Word has length 43 [2024-11-09 01:09:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:43,368 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 562 transitions. [2024-11-09 01:09:43,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 562 transitions. [2024-11-09 01:09:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 01:09:43,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:43,371 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:43,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 01:09:43,372 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:43,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1652657858, now seen corresponding path program 1 times [2024-11-09 01:09:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487759830] [2024-11-09 01:09:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:09:43,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487759830] [2024-11-09 01:09:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487759830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:43,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:43,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:43,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320020131] [2024-11-09 01:09:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:43,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:43,439 INFO L87 Difference]: Start difference. First operand 414 states and 562 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:09:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:43,551 INFO L93 Difference]: Finished difference Result 663 states and 886 transitions. [2024-11-09 01:09:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-09 01:09:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:43,557 INFO L225 Difference]: With dead ends: 663 [2024-11-09 01:09:43,558 INFO L226 Difference]: Without dead ends: 460 [2024-11-09 01:09:43,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:43,561 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 180 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:43,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 232 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-11-09 01:09:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2024-11-09 01:09:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 372 states have (on average 1.3413978494623655) internal successors, (499), 378 states have internal predecessors, (499), 58 states have call successors, (58), 29 states have call predecessors, (58), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-09 01:09:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 613 transitions. [2024-11-09 01:09:43,611 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 613 transitions. Word has length 46 [2024-11-09 01:09:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:43,612 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 613 transitions. [2024-11-09 01:09:43,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:09:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 613 transitions. [2024-11-09 01:09:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 01:09:43,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:43,615 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:43,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 01:09:43,615 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:43,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2101351925, now seen corresponding path program 1 times [2024-11-09 01:09:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:43,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701437180] [2024-11-09 01:09:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:09:43,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701437180] [2024-11-09 01:09:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701437180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:43,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:09:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836513205] [2024-11-09 01:09:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:43,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:43,736 INFO L87 Difference]: Start difference. First operand 460 states and 613 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:44,006 INFO L93 Difference]: Finished difference Result 500 states and 660 transitions. [2024-11-09 01:09:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-09 01:09:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:44,010 INFO L225 Difference]: With dead ends: 500 [2024-11-09 01:09:44,011 INFO L226 Difference]: Without dead ends: 497 [2024-11-09 01:09:44,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:44,013 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 336 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:44,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 231 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:09:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2024-11-09 01:09:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2024-11-09 01:09:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 372 states have (on average 1.336021505376344) internal successors, (497), 377 states have internal predecessors, (497), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-09 01:09:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 610 transitions. [2024-11-09 01:09:44,062 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 610 transitions. Word has length 47 [2024-11-09 01:09:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:44,063 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 610 transitions. [2024-11-09 01:09:44,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 610 transitions. [2024-11-09 01:09:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 01:09:44,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:44,065 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:44,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 01:09:44,066 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:44,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash -718204481, now seen corresponding path program 1 times [2024-11-09 01:09:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:44,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840485928] [2024-11-09 01:09:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:44,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:09:44,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:44,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840485928] [2024-11-09 01:09:44,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840485928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:44,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398058825] [2024-11-09 01:09:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:44,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:44,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:44,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:44,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:09:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:44,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:09:44,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:44,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:09:44,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398058825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:44,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67417974] [2024-11-09 01:09:44,847 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-09 01:09:44,847 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:44,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:44,857 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:44,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:49,387 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 101 for LOIs [2024-11-09 01:09:49,417 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 126 for LOIs [2024-11-09 01:09:49,472 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 112 for LOIs [2024-11-09 01:09:50,940 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:05,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8439#(and (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_11| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483647))) (<= 1 |#StackHeapBarrier|) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (not (= ~p_num_write~0 1)) (= ~T4_E~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2024-11-09 01:10:05,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:05,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:05,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2024-11-09 01:10:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237693366] [2024-11-09 01:10:05,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:05,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:10:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:10:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:10:05,926 INFO L87 Difference]: Start difference. First operand 459 states and 610 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:10:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:06,324 INFO L93 Difference]: Finished difference Result 902 states and 1178 transitions. [2024-11-09 01:10:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2024-11-09 01:10:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:06,330 INFO L225 Difference]: With dead ends: 902 [2024-11-09 01:10:06,330 INFO L226 Difference]: Without dead ends: 899 [2024-11-09 01:10:06,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:10:06,332 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 445 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:06,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 808 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-11-09 01:10:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 668. [2024-11-09 01:10:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 549 states have (on average 1.3296903460837888) internal successors, (730), 556 states have internal predecessors, (730), 76 states have call successors, (76), 42 states have call predecessors, (76), 41 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2024-11-09 01:10:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 881 transitions. [2024-11-09 01:10:06,389 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 881 transitions. Word has length 48 [2024-11-09 01:10:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:06,389 INFO L471 AbstractCegarLoop]: Abstraction has 668 states and 881 transitions. [2024-11-09 01:10:06,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:10:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 881 transitions. [2024-11-09 01:10:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 01:10:06,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:06,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:06,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:06,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 01:10:06,597 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:06,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2146388681, now seen corresponding path program 2 times [2024-11-09 01:10:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:06,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090016120] [2024-11-09 01:10:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 01:10:06,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:06,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090016120] [2024-11-09 01:10:06,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090016120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:06,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:06,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:10:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32597166] [2024-11-09 01:10:06,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:06,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:06,648 INFO L87 Difference]: Start difference. First operand 668 states and 881 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 01:10:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:06,758 INFO L93 Difference]: Finished difference Result 998 states and 1314 transitions. [2024-11-09 01:10:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2024-11-09 01:10:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:06,763 INFO L225 Difference]: With dead ends: 998 [2024-11-09 01:10:06,763 INFO L226 Difference]: Without dead ends: 610 [2024-11-09 01:10:06,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:06,765 INFO L432 NwaCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:06,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 248 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2024-11-09 01:10:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 601. [2024-11-09 01:10:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 492 states have (on average 1.3191056910569106) internal successors, (649), 500 states have internal predecessors, (649), 70 states have call successors, (70), 38 states have call predecessors, (70), 37 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-09 01:10:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 788 transitions. [2024-11-09 01:10:06,811 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 788 transitions. Word has length 61 [2024-11-09 01:10:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:06,811 INFO L471 AbstractCegarLoop]: Abstraction has 601 states and 788 transitions. [2024-11-09 01:10:06,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 01:10:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 788 transitions. [2024-11-09 01:10:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 01:10:06,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:06,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:06,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 01:10:06,814 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:06,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash -955456810, now seen corresponding path program 1 times [2024-11-09 01:10:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:06,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240186720] [2024-11-09 01:10:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:10:06,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240186720] [2024-11-09 01:10:06,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240186720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698199429] [2024-11-09 01:10:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:06,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:06,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:06,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:10:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:07,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:07,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 01:10:07,108 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698199429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:07,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732847757] [2024-11-09 01:10:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:07,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:07,110 INFO L87 Difference]: Start difference. First operand 601 states and 788 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 01:10:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:07,214 INFO L93 Difference]: Finished difference Result 728 states and 947 transitions. [2024-11-09 01:10:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2024-11-09 01:10:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:07,216 INFO L225 Difference]: With dead ends: 728 [2024-11-09 01:10:07,217 INFO L226 Difference]: Without dead ends: 194 [2024-11-09 01:10:07,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:07,218 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 25 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:07,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 362 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-09 01:10:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-11-09 01:10:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 149 states have (on average 1.389261744966443) internal successors, (207), 151 states have internal predecessors, (207), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 01:10:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 271 transitions. [2024-11-09 01:10:07,236 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 271 transitions. Word has length 73 [2024-11-09 01:10:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:07,236 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 271 transitions. [2024-11-09 01:10:07,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 01:10:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 271 transitions. [2024-11-09 01:10:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 01:10:07,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:07,238 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:07,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:10:07,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:10:07,440 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:07,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -46609068, now seen corresponding path program 1 times [2024-11-09 01:10:07,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:07,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43843386] [2024-11-09 01:10:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:10:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43843386] [2024-11-09 01:10:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43843386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:07,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670160082] [2024-11-09 01:10:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:07,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:07,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:07,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:07,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:10:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:07,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:07,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:10:07,729 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:07,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670160082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:07,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:07,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:10:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572529306] [2024-11-09 01:10:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:07,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:07,732 INFO L87 Difference]: Start difference. First operand 194 states and 271 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 01:10:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:07,855 INFO L93 Difference]: Finished difference Result 563 states and 798 transitions. [2024-11-09 01:10:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 01:10:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:07,859 INFO L225 Difference]: With dead ends: 563 [2024-11-09 01:10:07,860 INFO L226 Difference]: Without dead ends: 375 [2024-11-09 01:10:07,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:07,861 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 125 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:07,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 266 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-09 01:10:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 371. [2024-11-09 01:10:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 288 states have (on average 1.3819444444444444) internal successors, (398), 291 states have internal predecessors, (398), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-09 01:10:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 514 transitions. [2024-11-09 01:10:07,893 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 514 transitions. Word has length 81 [2024-11-09 01:10:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:07,894 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 514 transitions. [2024-11-09 01:10:07,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 01:10:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 514 transitions. [2024-11-09 01:10:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 01:10:07,898 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:07,898 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:07,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:10:08,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:10:08,100 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:08,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 462234932, now seen corresponding path program 1 times [2024-11-09 01:10:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:08,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004099450] [2024-11-09 01:10:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:10:08,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004099450] [2024-11-09 01:10:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004099450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820969026] [2024-11-09 01:10:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:08,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:08,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:08,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:10:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:08,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:08,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 01:10:08,378 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:08,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820969026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:08,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:08,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:10:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729711330] [2024-11-09 01:10:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:08,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:08,383 INFO L87 Difference]: Start difference. First operand 371 states and 514 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 01:10:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:08,504 INFO L93 Difference]: Finished difference Result 1088 states and 1529 transitions. [2024-11-09 01:10:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 01:10:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:08,509 INFO L225 Difference]: With dead ends: 1088 [2024-11-09 01:10:08,509 INFO L226 Difference]: Without dead ends: 723 [2024-11-09 01:10:08,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:08,511 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:08,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 229 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2024-11-09 01:10:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 717. [2024-11-09 01:10:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 560 states have (on average 1.3714285714285714) internal successors, (768), 565 states have internal predecessors, (768), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 01:10:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 984 transitions. [2024-11-09 01:10:08,571 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 984 transitions. Word has length 81 [2024-11-09 01:10:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:08,571 INFO L471 AbstractCegarLoop]: Abstraction has 717 states and 984 transitions. [2024-11-09 01:10:08,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 01:10:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 984 transitions. [2024-11-09 01:10:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 01:10:08,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:08,574 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:08,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:10:08,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:10:08,779 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:08,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1182328084, now seen corresponding path program 1 times [2024-11-09 01:10:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759311532] [2024-11-09 01:10:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:10:08,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:08,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759311532] [2024-11-09 01:10:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759311532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:08,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:10:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404713358] [2024-11-09 01:10:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:08,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:08,886 INFO L87 Difference]: Start difference. First operand 717 states and 984 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 01:10:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:09,016 INFO L93 Difference]: Finished difference Result 1279 states and 1773 transitions. [2024-11-09 01:10:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2024-11-09 01:10:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:09,023 INFO L225 Difference]: With dead ends: 1279 [2024-11-09 01:10:09,023 INFO L226 Difference]: Without dead ends: 913 [2024-11-09 01:10:09,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:09,027 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 59 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:09,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 307 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2024-11-09 01:10:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 841. [2024-11-09 01:10:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 676 states have (on average 1.4023668639053255) internal successors, (948), 681 states have internal predecessors, (948), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-09 01:10:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1172 transitions. [2024-11-09 01:10:09,097 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1172 transitions. Word has length 81 [2024-11-09 01:10:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:09,099 INFO L471 AbstractCegarLoop]: Abstraction has 841 states and 1172 transitions. [2024-11-09 01:10:09,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 01:10:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1172 transitions. [2024-11-09 01:10:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 01:10:09,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:09,102 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:09,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 01:10:09,103 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:09,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash -136101614, now seen corresponding path program 1 times [2024-11-09 01:10:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:09,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695837599] [2024-11-09 01:10:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:09,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 01:10:09,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695837599] [2024-11-09 01:10:09,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695837599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:09,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:09,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:10:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56431220] [2024-11-09 01:10:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:09,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:09,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:09,186 INFO L87 Difference]: Start difference. First operand 841 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 01:10:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:09,386 INFO L93 Difference]: Finished difference Result 2474 states and 3481 transitions. [2024-11-09 01:10:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2024-11-09 01:10:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:09,395 INFO L225 Difference]: With dead ends: 2474 [2024-11-09 01:10:09,395 INFO L226 Difference]: Without dead ends: 1639 [2024-11-09 01:10:09,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:09,398 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 112 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:09,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 231 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2024-11-09 01:10:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1625. [2024-11-09 01:10:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1308 states have (on average 1.385321100917431) internal successors, (1812), 1317 states have internal predecessors, (1812), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2024-11-09 01:10:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2236 transitions. [2024-11-09 01:10:09,529 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2236 transitions. Word has length 108 [2024-11-09 01:10:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:09,529 INFO L471 AbstractCegarLoop]: Abstraction has 1625 states and 2236 transitions. [2024-11-09 01:10:09,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 01:10:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2236 transitions. [2024-11-09 01:10:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 01:10:09,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:09,534 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:09,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 01:10:09,535 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:09,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1355830589, now seen corresponding path program 1 times [2024-11-09 01:10:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891019533] [2024-11-09 01:10:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 01:10:09,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:09,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891019533] [2024-11-09 01:10:09,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891019533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:09,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:09,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:10:09,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545204649] [2024-11-09 01:10:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:09,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:09,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:09,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:09,606 INFO L87 Difference]: Start difference. First operand 1625 states and 2236 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 01:10:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:09,893 INFO L93 Difference]: Finished difference Result 4790 states and 6649 transitions. [2024-11-09 01:10:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2024-11-09 01:10:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:09,933 INFO L225 Difference]: With dead ends: 4790 [2024-11-09 01:10:09,933 INFO L226 Difference]: Without dead ends: 3171 [2024-11-09 01:10:09,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:10:09,939 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 114 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:09,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 231 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2024-11-09 01:10:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3145. [2024-11-09 01:10:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2532 states have (on average 1.3665086887835702) internal successors, (3460), 2549 states have internal predecessors, (3460), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2024-11-09 01:10:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 4268 transitions. [2024-11-09 01:10:10,210 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 4268 transitions. Word has length 108 [2024-11-09 01:10:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:10,211 INFO L471 AbstractCegarLoop]: Abstraction has 3145 states and 4268 transitions. [2024-11-09 01:10:10,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 01:10:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 4268 transitions. [2024-11-09 01:10:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:10,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:10,221 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:10,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 01:10:10,221 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:10,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1254038964, now seen corresponding path program 1 times [2024-11-09 01:10:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379180173] [2024-11-09 01:10:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 01:10:10,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:10,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379180173] [2024-11-09 01:10:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379180173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:10,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466148046] [2024-11-09 01:10:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:10,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:10,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:10,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:10,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:10:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:10,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:10,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:10:10,570 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:10,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466148046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:10,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:10,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999232924] [2024-11-09 01:10:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:10,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:10,572 INFO L87 Difference]: Start difference. First operand 3145 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:10,891 INFO L93 Difference]: Finished difference Result 5465 states and 7383 transitions. [2024-11-09 01:10:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 01:10:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:10,909 INFO L225 Difference]: With dead ends: 5465 [2024-11-09 01:10:10,910 INFO L226 Difference]: Without dead ends: 3859 [2024-11-09 01:10:10,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:10,915 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 112 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:10,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 165 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:10:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2024-11-09 01:10:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3859. [2024-11-09 01:10:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3154 states have (on average 1.3348129359543437) internal successors, (4210), 3171 states have internal predecessors, (4210), 434 states have call successors, (434), 270 states have call predecessors, (434), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2024-11-09 01:10:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 5078 transitions. [2024-11-09 01:10:11,217 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 5078 transitions. Word has length 123 [2024-11-09 01:10:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:11,218 INFO L471 AbstractCegarLoop]: Abstraction has 3859 states and 5078 transitions. [2024-11-09 01:10:11,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 5078 transitions. [2024-11-09 01:10:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:11,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:11,229 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:11,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:10:11,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 01:10:11,429 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:11,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1464370573, now seen corresponding path program 1 times [2024-11-09 01:10:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:11,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372722433] [2024-11-09 01:10:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 01:10:11,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:11,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372722433] [2024-11-09 01:10:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372722433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950236678] [2024-11-09 01:10:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:11,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:11,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:11,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:10:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:11,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:11,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 01:10:11,779 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950236678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:11,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744424026] [2024-11-09 01:10:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:11,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:11,782 INFO L87 Difference]: Start difference. First operand 3859 states and 5078 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:12,171 INFO L93 Difference]: Finished difference Result 6989 states and 9324 transitions. [2024-11-09 01:10:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 01:10:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:12,197 INFO L225 Difference]: With dead ends: 6989 [2024-11-09 01:10:12,198 INFO L226 Difference]: Without dead ends: 5015 [2024-11-09 01:10:12,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:12,205 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 66 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:12,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 311 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5015 states. [2024-11-09 01:10:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5015 to 4479. [2024-11-09 01:10:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4479 states, 3726 states have (on average 1.3596349973161568) internal successors, (5066), 3743 states have internal predecessors, (5066), 458 states have call successors, (458), 294 states have call predecessors, (458), 294 states have return successors, (458), 442 states have call predecessors, (458), 458 states have call successors, (458) [2024-11-09 01:10:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4479 states to 4479 states and 5982 transitions. [2024-11-09 01:10:12,605 INFO L78 Accepts]: Start accepts. Automaton has 4479 states and 5982 transitions. Word has length 123 [2024-11-09 01:10:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:12,606 INFO L471 AbstractCegarLoop]: Abstraction has 4479 states and 5982 transitions. [2024-11-09 01:10:12,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4479 states and 5982 transitions. [2024-11-09 01:10:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:12,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:12,618 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:12,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 01:10:12,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:12,819 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:12,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -115727730, now seen corresponding path program 1 times [2024-11-09 01:10:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:12,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261578760] [2024-11-09 01:10:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 01:10:12,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261578760] [2024-11-09 01:10:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261578760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098445465] [2024-11-09 01:10:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:12,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:12,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:12,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:10:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:13,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:13,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 01:10:13,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:13,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098445465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:13,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:13,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:13,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008940965] [2024-11-09 01:10:13,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:13,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:13,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:13,130 INFO L87 Difference]: Start difference. First operand 4479 states and 5982 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:13,599 INFO L93 Difference]: Finished difference Result 8417 states and 11376 transitions. [2024-11-09 01:10:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 01:10:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:13,636 INFO L225 Difference]: With dead ends: 8417 [2024-11-09 01:10:13,638 INFO L226 Difference]: Without dead ends: 6127 [2024-11-09 01:10:13,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:13,645 INFO L432 NwaCegarLoop]: 197 mSDtfsCounter, 78 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:13,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 323 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6127 states. [2024-11-09 01:10:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6127 to 5367. [2024-11-09 01:10:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 4542 states have (on average 1.3795684720387495) internal successors, (6266), 4559 states have internal predecessors, (6266), 494 states have call successors, (494), 330 states have call predecessors, (494), 330 states have return successors, (494), 478 states have call predecessors, (494), 494 states have call successors, (494) [2024-11-09 01:10:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7254 transitions. [2024-11-09 01:10:14,152 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7254 transitions. Word has length 123 [2024-11-09 01:10:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:14,153 INFO L471 AbstractCegarLoop]: Abstraction has 5367 states and 7254 transitions. [2024-11-09 01:10:14,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7254 transitions. [2024-11-09 01:10:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:14,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:14,167 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:14,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:10:14,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:10:14,368 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:14,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2096959488, now seen corresponding path program 1 times [2024-11-09 01:10:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:14,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058194606] [2024-11-09 01:10:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 01:10:14,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:14,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058194606] [2024-11-09 01:10:14,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058194606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237308005] [2024-11-09 01:10:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:14,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:14,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:14,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:14,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:10:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:14,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:14,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 01:10:14,659 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237308005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:14,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:14,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:14,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617252808] [2024-11-09 01:10:14,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:14,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:14,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:14,662 INFO L87 Difference]: Start difference. First operand 5367 states and 7254 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:15,231 INFO L93 Difference]: Finished difference Result 10305 states and 14082 transitions. [2024-11-09 01:10:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 01:10:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:15,263 INFO L225 Difference]: With dead ends: 10305 [2024-11-09 01:10:15,264 INFO L226 Difference]: Without dead ends: 7535 [2024-11-09 01:10:15,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:15,272 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 84 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:15,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 333 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2024-11-09 01:10:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6663. [2024-11-09 01:10:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6663 states, 5730 states have (on average 1.3951134380453751) internal successors, (7994), 5747 states have internal predecessors, (7994), 548 states have call successors, (548), 384 states have call predecessors, (548), 384 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2024-11-09 01:10:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6663 states to 6663 states and 9090 transitions. [2024-11-09 01:10:15,842 INFO L78 Accepts]: Start accepts. Automaton has 6663 states and 9090 transitions. Word has length 123 [2024-11-09 01:10:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:15,843 INFO L471 AbstractCegarLoop]: Abstraction has 6663 states and 9090 transitions. [2024-11-09 01:10:15,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6663 states and 9090 transitions. [2024-11-09 01:10:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:15,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:15,856 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:15,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:10:16,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:16,057 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:16,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1003947236, now seen corresponding path program 1 times [2024-11-09 01:10:16,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:16,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295836621] [2024-11-09 01:10:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 01:10:16,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295836621] [2024-11-09 01:10:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295836621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371955236] [2024-11-09 01:10:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:16,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:16,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:10:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:16,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:10:16,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 01:10:16,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:16,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371955236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:16,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:16,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 01:10:16,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005624757] [2024-11-09 01:10:16,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:16,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:16,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:16,362 INFO L87 Difference]: Start difference. First operand 6663 states and 9090 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:16,817 INFO L93 Difference]: Finished difference Result 12619 states and 17385 transitions. [2024-11-09 01:10:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:16,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 01:10:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:16,851 INFO L225 Difference]: With dead ends: 12619 [2024-11-09 01:10:16,852 INFO L226 Difference]: Without dead ends: 9174 [2024-11-09 01:10:16,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:16,862 INFO L432 NwaCegarLoop]: 197 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:16,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 323 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9174 states. [2024-11-09 01:10:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9174 to 8526. [2024-11-09 01:10:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 7431 states have (on average 1.4027721706365226) internal successors, (10424), 7448 states have internal predecessors, (10424), 629 states have call successors, (629), 465 states have call predecessors, (629), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2024-11-09 01:10:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 11682 transitions. [2024-11-09 01:10:17,562 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 11682 transitions. Word has length 123 [2024-11-09 01:10:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:17,563 INFO L471 AbstractCegarLoop]: Abstraction has 8526 states and 11682 transitions. [2024-11-09 01:10:17,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 11682 transitions. [2024-11-09 01:10:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:17,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:17,580 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:17,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:10:17,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:17,781 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:17,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash 482669998, now seen corresponding path program 2 times [2024-11-09 01:10:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492994896] [2024-11-09 01:10:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 01:10:18,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:18,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492994896] [2024-11-09 01:10:18,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492994896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:18,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251110231] [2024-11-09 01:10:18,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:18,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:18,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:18,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:10:18,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:10:18,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:18,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:10:18,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:10:18,162 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251110231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:18,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:18,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664524340] [2024-11-09 01:10:18,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:18,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:18,164 INFO L87 Difference]: Start difference. First operand 8526 states and 11682 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:18,841 INFO L93 Difference]: Finished difference Result 13798 states and 19072 transitions. [2024-11-09 01:10:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 01:10:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:18,873 INFO L225 Difference]: With dead ends: 13798 [2024-11-09 01:10:18,873 INFO L226 Difference]: Without dead ends: 8544 [2024-11-09 01:10:18,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:18,885 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 125 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:18,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 333 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2024-11-09 01:10:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 8396. [2024-11-09 01:10:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 7301 states have (on average 1.3833721408026298) internal successors, (10100), 7318 states have internal predecessors, (10100), 629 states have call successors, (629), 465 states have call predecessors, (629), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2024-11-09 01:10:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 11358 transitions. [2024-11-09 01:10:19,529 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 11358 transitions. Word has length 123 [2024-11-09 01:10:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:19,530 INFO L471 AbstractCegarLoop]: Abstraction has 8396 states and 11358 transitions. [2024-11-09 01:10:19,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 11358 transitions. [2024-11-09 01:10:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:19,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:19,546 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:19,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:19,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 01:10:19,747 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:19,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1674866461, now seen corresponding path program 2 times [2024-11-09 01:10:19,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:19,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962335910] [2024-11-09 01:10:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 01:10:19,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962335910] [2024-11-09 01:10:19,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962335910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548303484] [2024-11-09 01:10:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:19,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:19,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:10:20,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:10:20,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:20,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:10:20,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:10:20,316 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548303484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:20,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 01:10:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912934761] [2024-11-09 01:10:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:20,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:10:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:10:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:10:20,318 INFO L87 Difference]: Start difference. First operand 8396 states and 11358 transitions. Second operand has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:10:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:21,323 INFO L93 Difference]: Finished difference Result 14089 states and 19108 transitions. [2024-11-09 01:10:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2024-11-09 01:10:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:21,352 INFO L225 Difference]: With dead ends: 14089 [2024-11-09 01:10:21,352 INFO L226 Difference]: Without dead ends: 8906 [2024-11-09 01:10:21,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:21,365 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 216 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:21,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 253 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:10:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2024-11-09 01:10:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 8758. [2024-11-09 01:10:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 7619 states have (on average 1.372621078881743) internal successors, (10458), 7636 states have internal predecessors, (10458), 643 states have call successors, (643), 495 states have call predecessors, (643), 495 states have return successors, (643), 627 states have call predecessors, (643), 643 states have call successors, (643) [2024-11-09 01:10:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 11744 transitions. [2024-11-09 01:10:22,031 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 11744 transitions. Word has length 123 [2024-11-09 01:10:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:22,032 INFO L471 AbstractCegarLoop]: Abstraction has 8758 states and 11744 transitions. [2024-11-09 01:10:22,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:10:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 11744 transitions. [2024-11-09 01:10:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:22,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:22,047 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:22,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:22,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 01:10:22,248 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:22,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -763783868, now seen corresponding path program 2 times [2024-11-09 01:10:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280825652] [2024-11-09 01:10:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 01:10:22,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280825652] [2024-11-09 01:10:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280825652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22625277] [2024-11-09 01:10:22,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:22,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:22,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:22,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:10:22,579 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:10:22,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:22,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:10:22,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:10:22,620 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22625277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:22,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:22,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087265808] [2024-11-09 01:10:22,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:22,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:22,624 INFO L87 Difference]: Start difference. First operand 8758 states and 11744 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:23,466 INFO L93 Difference]: Finished difference Result 14354 states and 19450 transitions. [2024-11-09 01:10:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 01:10:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:23,504 INFO L225 Difference]: With dead ends: 14354 [2024-11-09 01:10:23,504 INFO L226 Difference]: Without dead ends: 8776 [2024-11-09 01:10:23,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:23,516 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 116 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:23,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 331 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2024-11-09 01:10:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 8628. [2024-11-09 01:10:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8628 states, 7489 states have (on average 1.351048204032581) internal successors, (10118), 7506 states have internal predecessors, (10118), 643 states have call successors, (643), 495 states have call predecessors, (643), 495 states have return successors, (643), 627 states have call predecessors, (643), 643 states have call successors, (643) [2024-11-09 01:10:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8628 states to 8628 states and 11404 transitions. [2024-11-09 01:10:24,479 INFO L78 Accepts]: Start accepts. Automaton has 8628 states and 11404 transitions. Word has length 123 [2024-11-09 01:10:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:24,480 INFO L471 AbstractCegarLoop]: Abstraction has 8628 states and 11404 transitions. [2024-11-09 01:10:24,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8628 states and 11404 transitions. [2024-11-09 01:10:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:10:24,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:24,503 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:24,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 01:10:24,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 01:10:24,703 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:24,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 911273316, now seen corresponding path program 1 times [2024-11-09 01:10:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142595269] [2024-11-09 01:10:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 01:10:24,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:24,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142595269] [2024-11-09 01:10:24,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142595269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:24,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093619572] [2024-11-09 01:10:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:24,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:24,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:24,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:24,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:10:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:25,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:10:25,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:10:25,109 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093619572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:25,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:25,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:25,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415762334] [2024-11-09 01:10:25,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:25,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:25,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:25,112 INFO L87 Difference]: Start difference. First operand 8628 states and 11404 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:26,182 INFO L93 Difference]: Finished difference Result 21543 states and 28751 transitions. [2024-11-09 01:10:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 01:10:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:26,231 INFO L225 Difference]: With dead ends: 21543 [2024-11-09 01:10:26,231 INFO L226 Difference]: Without dead ends: 12922 [2024-11-09 01:10:26,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:26,249 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 62 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:26,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 245 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12922 states. [2024-11-09 01:10:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12922 to 10445. [2024-11-09 01:10:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 9140 states have (on average 1.361487964989059) internal successors, (12444), 9158 states have internal predecessors, (12444), 726 states have call successors, (726), 578 states have call predecessors, (726), 578 states have return successors, (726), 709 states have call predecessors, (726), 726 states have call successors, (726) [2024-11-09 01:10:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 13896 transitions. [2024-11-09 01:10:27,288 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 13896 transitions. Word has length 123 [2024-11-09 01:10:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:27,288 INFO L471 AbstractCegarLoop]: Abstraction has 10445 states and 13896 transitions. [2024-11-09 01:10:27,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 01:10:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 13896 transitions. [2024-11-09 01:10:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 01:10:27,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:27,305 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:27,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 01:10:27,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 01:10:27,506 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:27,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -316342752, now seen corresponding path program 1 times [2024-11-09 01:10:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860678188] [2024-11-09 01:10:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 01:10:27,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860678188] [2024-11-09 01:10:27,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860678188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252015257] [2024-11-09 01:10:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:27,897 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:10:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:28,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 01:10:28,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:10:28,210 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252015257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:28,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:28,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:10:28,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009991217] [2024-11-09 01:10:28,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:28,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:10:28,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:10:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:10:28,212 INFO L87 Difference]: Start difference. First operand 10445 states and 13896 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 01:10:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:29,367 INFO L93 Difference]: Finished difference Result 17657 states and 23422 transitions. [2024-11-09 01:10:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2024-11-09 01:10:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:29,416 INFO L225 Difference]: With dead ends: 17657 [2024-11-09 01:10:29,417 INFO L226 Difference]: Without dead ends: 12381 [2024-11-09 01:10:29,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:29,428 INFO L432 NwaCegarLoop]: 188 mSDtfsCounter, 97 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:29,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 540 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12381 states. [2024-11-09 01:10:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12381 to 11471. [2024-11-09 01:10:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 9950 states have (on average 1.3516582914572863) internal successors, (13449), 9984 states have internal predecessors, (13449), 844 states have call successors, (844), 660 states have call predecessors, (844), 676 states have return successors, (876), 827 states have call predecessors, (876), 844 states have call successors, (876) [2024-11-09 01:10:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 15169 transitions. [2024-11-09 01:10:30,378 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 15169 transitions. Word has length 129 [2024-11-09 01:10:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:30,378 INFO L471 AbstractCegarLoop]: Abstraction has 11471 states and 15169 transitions. [2024-11-09 01:10:30,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 01:10:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 15169 transitions. [2024-11-09 01:10:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 01:10:30,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:30,402 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:30,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 01:10:30,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:30,603 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:30,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:30,604 INFO L85 PathProgramCache]: Analyzing trace with hash -955682190, now seen corresponding path program 1 times [2024-11-09 01:10:30,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:30,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133075927] [2024-11-09 01:10:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 01:10:30,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133075927] [2024-11-09 01:10:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133075927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840941248] [2024-11-09 01:10:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:30,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:30,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:30,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:10:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:31,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:10:31,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:10:31,272 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840941248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:31,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:31,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 01:10:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653467787] [2024-11-09 01:10:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:31,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:10:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:10:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:10:31,275 INFO L87 Difference]: Start difference. First operand 11471 states and 15169 transitions. Second operand has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:10:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:32,943 INFO L93 Difference]: Finished difference Result 20363 states and 27086 transitions. [2024-11-09 01:10:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2024-11-09 01:10:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:32,998 INFO L225 Difference]: With dead ends: 20363 [2024-11-09 01:10:32,998 INFO L226 Difference]: Without dead ends: 11968 [2024-11-09 01:10:33,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:33,017 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 176 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:33,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 250 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11968 states. [2024-11-09 01:10:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11968 to 11920. [2024-11-09 01:10:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11920 states, 10349 states have (on average 1.3381002995458497) internal successors, (13848), 10383 states have internal predecessors, (13848), 859 states have call successors, (859), 695 states have call predecessors, (859), 711 states have return successors, (891), 842 states have call predecessors, (891), 859 states have call successors, (891) [2024-11-09 01:10:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11920 states to 11920 states and 15598 transitions. [2024-11-09 01:10:34,134 INFO L78 Accepts]: Start accepts. Automaton has 11920 states and 15598 transitions. Word has length 125 [2024-11-09 01:10:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:34,134 INFO L471 AbstractCegarLoop]: Abstraction has 11920 states and 15598 transitions. [2024-11-09 01:10:34,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:10:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 11920 states and 15598 transitions. [2024-11-09 01:10:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 01:10:34,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:34,151 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:34,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 01:10:34,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:34,352 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:34,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1304413442, now seen corresponding path program 1 times [2024-11-09 01:10:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:34,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732631780] [2024-11-09 01:10:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 01:10:34,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:34,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732631780] [2024-11-09 01:10:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732631780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538083363] [2024-11-09 01:10:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:34,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:34,551 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:10:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:34,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:10:34,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:34,791 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:34,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538083363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:10:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077056235] [2024-11-09 01:10:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:34,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:10:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:10:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:10:34,794 INFO L87 Difference]: Start difference. First operand 11920 states and 15598 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 01:10:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:35,926 INFO L93 Difference]: Finished difference Result 22054 states and 28987 transitions. [2024-11-09 01:10:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 127 [2024-11-09 01:10:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:35,979 INFO L225 Difference]: With dead ends: 22054 [2024-11-09 01:10:35,979 INFO L226 Difference]: Without dead ends: 13384 [2024-11-09 01:10:35,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:35,999 INFO L432 NwaCegarLoop]: 202 mSDtfsCounter, 111 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:35,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 554 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:10:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2024-11-09 01:10:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 11180. [2024-11-09 01:10:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 9563 states have (on average 1.3206106870229009) internal successors, (12629), 9609 states have internal predecessors, (12629), 890 states have call successors, (890), 694 states have call predecessors, (890), 726 states have return successors, (954), 877 states have call predecessors, (954), 890 states have call successors, (954) [2024-11-09 01:10:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 14473 transitions. [2024-11-09 01:10:37,086 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 14473 transitions. Word has length 127 [2024-11-09 01:10:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:37,086 INFO L471 AbstractCegarLoop]: Abstraction has 11180 states and 14473 transitions. [2024-11-09 01:10:37,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 01:10:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 14473 transitions. [2024-11-09 01:10:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 01:10:37,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:37,102 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:10:37,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 01:10:37,307 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:37,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1313821039, now seen corresponding path program 1 times [2024-11-09 01:10:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920475534] [2024-11-09 01:10:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 01:10:37,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920475534] [2024-11-09 01:10:37,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920475534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110936142] [2024-11-09 01:10:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:37,557 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:37,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:10:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:37,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:10:37,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 01:10:37,828 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:37,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110936142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:37,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:37,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252936127] [2024-11-09 01:10:37,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:37,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:37,831 INFO L87 Difference]: Start difference. First operand 11180 states and 14473 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:38,715 INFO L93 Difference]: Finished difference Result 21078 states and 27420 transitions. [2024-11-09 01:10:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 159 [2024-11-09 01:10:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:38,745 INFO L225 Difference]: With dead ends: 21078 [2024-11-09 01:10:38,746 INFO L226 Difference]: Without dead ends: 12268 [2024-11-09 01:10:38,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:38,759 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 94 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:38,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 173 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12268 states. [2024-11-09 01:10:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12268 to 12172. [2024-11-09 01:10:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12172 states, 10483 states have (on average 1.293618239053706) internal successors, (13561), 10529 states have internal predecessors, (13561), 902 states have call successors, (902), 754 states have call predecessors, (902), 786 states have return successors, (1022), 889 states have call predecessors, (1022), 902 states have call successors, (1022) [2024-11-09 01:10:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12172 states to 12172 states and 15485 transitions. [2024-11-09 01:10:40,019 INFO L78 Accepts]: Start accepts. Automaton has 12172 states and 15485 transitions. Word has length 159 [2024-11-09 01:10:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:40,019 INFO L471 AbstractCegarLoop]: Abstraction has 12172 states and 15485 transitions. [2024-11-09 01:10:40,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 01:10:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states and 15485 transitions. [2024-11-09 01:10:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 01:10:40,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:40,034 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:40,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 01:10:40,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 01:10:40,235 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:40,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2060219186, now seen corresponding path program 1 times [2024-11-09 01:10:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645096057] [2024-11-09 01:10:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 01:10:40,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645096057] [2024-11-09 01:10:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645096057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098655339] [2024-11-09 01:10:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:40,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:40,481 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:40,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:10:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:40,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:10:40,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 01:10:40,781 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:40,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098655339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:40,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:40,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:40,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065232452] [2024-11-09 01:10:40,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:40,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:40,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:40,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:40,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:40,783 INFO L87 Difference]: Start difference. First operand 12172 states and 15485 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:10:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:42,274 INFO L93 Difference]: Finished difference Result 21548 states and 27842 transitions. [2024-11-09 01:10:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 159 [2024-11-09 01:10:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:42,320 INFO L225 Difference]: With dead ends: 21548 [2024-11-09 01:10:42,320 INFO L226 Difference]: Without dead ends: 12062 [2024-11-09 01:10:42,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:42,342 INFO L432 NwaCegarLoop]: 200 mSDtfsCounter, 103 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:42,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 301 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2024-11-09 01:10:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11876. [2024-11-09 01:10:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11876 states, 10187 states have (on average 1.2662216550505547) internal successors, (12899), 10233 states have internal predecessors, (12899), 902 states have call successors, (902), 754 states have call predecessors, (902), 786 states have return successors, (1022), 889 states have call predecessors, (1022), 902 states have call successors, (1022) [2024-11-09 01:10:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11876 states to 11876 states and 14823 transitions. [2024-11-09 01:10:43,429 INFO L78 Accepts]: Start accepts. Automaton has 11876 states and 14823 transitions. Word has length 159 [2024-11-09 01:10:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:43,430 INFO L471 AbstractCegarLoop]: Abstraction has 11876 states and 14823 transitions. [2024-11-09 01:10:43,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:10:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11876 states and 14823 transitions. [2024-11-09 01:10:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 01:10:43,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:43,444 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:43,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 01:10:43,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 01:10:43,644 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:43,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1105523436, now seen corresponding path program 1 times [2024-11-09 01:10:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:43,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234235169] [2024-11-09 01:10:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:43,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 01:10:43,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:43,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234235169] [2024-11-09 01:10:43,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234235169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:43,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197354377] [2024-11-09 01:10:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:43,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:43,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:43,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:43,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:10:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:44,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:10:44,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:10:44,137 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:44,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197354377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:44,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:44,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:10:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608855371] [2024-11-09 01:10:44,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:44,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:10:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:10:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:10:44,140 INFO L87 Difference]: Start difference. First operand 11876 states and 14823 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 01:10:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:45,695 INFO L93 Difference]: Finished difference Result 26449 states and 33049 transitions. [2024-11-09 01:10:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 162 [2024-11-09 01:10:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:45,749 INFO L225 Difference]: With dead ends: 26449 [2024-11-09 01:10:45,749 INFO L226 Difference]: Without dead ends: 17335 [2024-11-09 01:10:45,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:45,770 INFO L432 NwaCegarLoop]: 196 mSDtfsCounter, 106 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:45,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 548 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17335 states. [2024-11-09 01:10:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17335 to 15264. [2024-11-09 01:10:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15264 states, 12927 states have (on average 1.2371779995358552) internal successors, (15993), 12965 states have internal predecessors, (15993), 1286 states have call successors, (1286), 1042 states have call predecessors, (1286), 1050 states have return successors, (1494), 1257 states have call predecessors, (1494), 1286 states have call successors, (1494) [2024-11-09 01:10:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15264 states to 15264 states and 18773 transitions. [2024-11-09 01:10:47,077 INFO L78 Accepts]: Start accepts. Automaton has 15264 states and 18773 transitions. Word has length 162 [2024-11-09 01:10:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:47,077 INFO L471 AbstractCegarLoop]: Abstraction has 15264 states and 18773 transitions. [2024-11-09 01:10:47,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 01:10:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15264 states and 18773 transitions. [2024-11-09 01:10:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 01:10:47,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:47,095 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:47,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 01:10:47,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:47,299 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:47,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash -694114312, now seen corresponding path program 1 times [2024-11-09 01:10:47,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020445063] [2024-11-09 01:10:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:47,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 01:10:47,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020445063] [2024-11-09 01:10:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020445063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202730798] [2024-11-09 01:10:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:47,554 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:47,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 01:10:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:47,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:10:47,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 01:10:47,788 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202730798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:47,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625425999] [2024-11-09 01:10:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:47,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:47,791 INFO L87 Difference]: Start difference. First operand 15264 states and 18773 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:10:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:48,963 INFO L93 Difference]: Finished difference Result 24126 states and 30397 transitions. [2024-11-09 01:10:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 195 [2024-11-09 01:10:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:49,014 INFO L225 Difference]: With dead ends: 24126 [2024-11-09 01:10:49,014 INFO L226 Difference]: Without dead ends: 15306 [2024-11-09 01:10:49,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:49,036 INFO L432 NwaCegarLoop]: 222 mSDtfsCounter, 101 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:49,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 334 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2024-11-09 01:10:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 15152. [2024-11-09 01:10:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15152 states, 12815 states have (on average 1.2136558720249708) internal successors, (15553), 12853 states have internal predecessors, (15553), 1286 states have call successors, (1286), 1042 states have call predecessors, (1286), 1050 states have return successors, (1494), 1257 states have call predecessors, (1494), 1286 states have call successors, (1494) [2024-11-09 01:10:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15152 states to 15152 states and 18333 transitions. [2024-11-09 01:10:50,570 INFO L78 Accepts]: Start accepts. Automaton has 15152 states and 18333 transitions. Word has length 195 [2024-11-09 01:10:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:50,571 INFO L471 AbstractCegarLoop]: Abstraction has 15152 states and 18333 transitions. [2024-11-09 01:10:50,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:10:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 15152 states and 18333 transitions. [2024-11-09 01:10:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 01:10:50,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:50,583 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:50,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:50,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:50,784 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:50,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:50,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1445302554, now seen corresponding path program 1 times [2024-11-09 01:10:50,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:50,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642082445] [2024-11-09 01:10:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 01:10:51,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642082445] [2024-11-09 01:10:51,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642082445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:51,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918792588] [2024-11-09 01:10:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:51,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:51,021 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:51,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 01:10:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:51,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:10:51,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 01:10:51,293 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:51,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918792588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:51,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:51,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:10:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562866052] [2024-11-09 01:10:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:51,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:10:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:10:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:51,297 INFO L87 Difference]: Start difference. First operand 15152 states and 18333 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:10:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:52,595 INFO L93 Difference]: Finished difference Result 25568 states and 31200 transitions. [2024-11-09 01:10:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 195 [2024-11-09 01:10:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:52,633 INFO L225 Difference]: With dead ends: 25568 [2024-11-09 01:10:52,633 INFO L226 Difference]: Without dead ends: 16972 [2024-11-09 01:10:52,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:52,645 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:52,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 173 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:10:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16972 states. [2024-11-09 01:10:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16972 to 16864. [2024-11-09 01:10:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16864 states, 14415 states have (on average 1.186888657648283) internal successors, (17109), 14469 states have internal predecessors, (17109), 1286 states have call successors, (1286), 1122 states have call predecessors, (1286), 1162 states have return successors, (1602), 1273 states have call predecessors, (1602), 1286 states have call successors, (1602) [2024-11-09 01:10:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16864 states to 16864 states and 19997 transitions. [2024-11-09 01:10:54,151 INFO L78 Accepts]: Start accepts. Automaton has 16864 states and 19997 transitions. Word has length 195 [2024-11-09 01:10:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:54,152 INFO L471 AbstractCegarLoop]: Abstraction has 16864 states and 19997 transitions. [2024-11-09 01:10:54,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:10:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16864 states and 19997 transitions. [2024-11-09 01:10:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-09 01:10:54,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:54,166 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:54,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:54,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:54,367 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:54,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash 184600008, now seen corresponding path program 1 times [2024-11-09 01:10:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826811145] [2024-11-09 01:10:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 01:10:54,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826811145] [2024-11-09 01:10:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826811145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747561101] [2024-11-09 01:10:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:54,600 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:54,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 01:10:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:54,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:10:54,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 01:10:54,877 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:10:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747561101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:54,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:10:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:10:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561741773] [2024-11-09 01:10:54,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:54,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:10:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:10:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:10:54,879 INFO L87 Difference]: Start difference. First operand 16864 states and 19997 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:10:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:57,370 INFO L93 Difference]: Finished difference Result 33189 states and 39546 transitions. [2024-11-09 01:10:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:10:57,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 199 [2024-11-09 01:10:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:57,438 INFO L225 Difference]: With dead ends: 33189 [2024-11-09 01:10:57,438 INFO L226 Difference]: Without dead ends: 23391 [2024-11-09 01:10:57,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:10:57,455 INFO L432 NwaCegarLoop]: 193 mSDtfsCounter, 103 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:57,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 545 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23391 states. [2024-11-09 01:10:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23391 to 21716. [2024-11-09 01:10:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21716 states, 18431 states have (on average 1.1650480169280018) internal successors, (21473), 18483 states have internal predecessors, (21473), 1750 states have call successors, (1750), 1506 states have call predecessors, (1750), 1534 states have return successors, (2254), 1727 states have call predecessors, (2254), 1750 states have call successors, (2254) [2024-11-09 01:10:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21716 states to 21716 states and 25477 transitions. [2024-11-09 01:10:59,477 INFO L78 Accepts]: Start accepts. Automaton has 21716 states and 25477 transitions. Word has length 199 [2024-11-09 01:10:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:59,477 INFO L471 AbstractCegarLoop]: Abstraction has 21716 states and 25477 transitions. [2024-11-09 01:10:59,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:10:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21716 states and 25477 transitions. [2024-11-09 01:10:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-09 01:10:59,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:59,499 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:59,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:59,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:59,700 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:59,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 315159013, now seen corresponding path program 1 times [2024-11-09 01:10:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:59,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803297551] [2024-11-09 01:10:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 18 proven. 102 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-09 01:11:00,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803297551] [2024-11-09 01:11:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803297551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688130482] [2024-11-09 01:11:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:00,154 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:00,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 01:11:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:00,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 01:11:00,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-09 01:11:00,677 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:11:00,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688130482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:11:00,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:11:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 01:11:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595964542] [2024-11-09 01:11:00,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:11:00,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:11:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:11:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:11:00,680 INFO L87 Difference]: Start difference. First operand 21716 states and 25477 transitions. Second operand has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-09 01:11:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:03,129 INFO L93 Difference]: Finished difference Result 35227 states and 41341 transitions. [2024-11-09 01:11:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:11:03,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 207 [2024-11-09 01:11:03,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:03,175 INFO L225 Difference]: With dead ends: 35227 [2024-11-09 01:11:03,175 INFO L226 Difference]: Without dead ends: 17303 [2024-11-09 01:11:03,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 01:11:03,197 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 204 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:03,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 246 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:11:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17303 states. [2024-11-09 01:11:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17303 to 16605. [2024-11-09 01:11:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16605 states, 13988 states have (on average 1.1632828138404347) internal successors, (16272), 14054 states have internal predecessors, (16272), 1392 states have call successors, (1392), 1160 states have call predecessors, (1392), 1224 states have return successors, (1696), 1391 states have call predecessors, (1696), 1392 states have call successors, (1696) [2024-11-09 01:11:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16605 states to 16605 states and 19360 transitions. [2024-11-09 01:11:05,335 INFO L78 Accepts]: Start accepts. Automaton has 16605 states and 19360 transitions. Word has length 207 [2024-11-09 01:11:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:05,335 INFO L471 AbstractCegarLoop]: Abstraction has 16605 states and 19360 transitions. [2024-11-09 01:11:05,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-09 01:11:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16605 states and 19360 transitions. [2024-11-09 01:11:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-09 01:11:05,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:05,349 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:05,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 01:11:05,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 01:11:05,550 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:11:05,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1750753556, now seen corresponding path program 1 times [2024-11-09 01:11:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278422394] [2024-11-09 01:11:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-09 01:11:06,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278422394] [2024-11-09 01:11:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278422394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:11:06,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:11:06,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 01:11:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747069850] [2024-11-09 01:11:06,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:11:06,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:11:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:11:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:11:06,022 INFO L87 Difference]: Start difference. First operand 16605 states and 19360 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:11:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:15,421 INFO L93 Difference]: Finished difference Result 79708 states and 93714 transitions. [2024-11-09 01:11:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:11:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 237 [2024-11-09 01:11:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:15,592 INFO L225 Difference]: With dead ends: 79708 [2024-11-09 01:11:15,592 INFO L226 Difference]: Without dead ends: 73896 [2024-11-09 01:11:15,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:11:15,612 INFO L432 NwaCegarLoop]: 526 mSDtfsCounter, 570 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:15,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 2105 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:11:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73896 states. [2024-11-09 01:11:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73896 to 47838. [2024-11-09 01:11:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47838 states, 40256 states have (on average 1.1751788553259142) internal successors, (47308), 40452 states have internal predecessors, (47308), 4036 states have call successors, (4036), 3326 states have call predecessors, (4036), 3545 states have return successors, (4956), 4060 states have call predecessors, (4956), 4036 states have call successors, (4956) [2024-11-09 01:11:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47838 states to 47838 states and 56300 transitions. [2024-11-09 01:11:22,253 INFO L78 Accepts]: Start accepts. Automaton has 47838 states and 56300 transitions. Word has length 237 [2024-11-09 01:11:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:22,253 INFO L471 AbstractCegarLoop]: Abstraction has 47838 states and 56300 transitions. [2024-11-09 01:11:22,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:11:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 47838 states and 56300 transitions. [2024-11-09 01:11:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-11-09 01:11:22,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:22,292 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:22,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-09 01:11:22,293 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:11:22,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2069988, now seen corresponding path program 1 times [2024-11-09 01:11:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:22,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058206223] [2024-11-09 01:11:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:22,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 18 proven. 137 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 01:11:23,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058206223] [2024-11-09 01:11:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058206223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67049362] [2024-11-09 01:11:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:23,027 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:23,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 01:11:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:23,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 01:11:23,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-09 01:11:23,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:11:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 44 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 01:11:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67049362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:11:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985200093] [2024-11-09 01:11:24,093 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2024-11-09 01:11:24,093 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:11:24,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:11:24,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:11:24,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:11:44,783 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 165 for LOIs [2024-11-09 01:11:44,927 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 9 for LOIs [2024-11-09 01:11:44,938 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 125 for LOIs [2024-11-09 01:11:45,018 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 6 for LOIs [2024-11-09 01:11:45,055 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 6 for LOIs [2024-11-09 01:11:45,215 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 156 for LOIs [2024-11-09 01:11:45,448 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:59,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '918333#(and (not (= ~token~0 (+ ~local~0 4))) (= ~m_pc~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 2147483647) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 0)) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 2147483648)))) (= ~m_st~0 1) (= 1 ~t4_pc~0))' at error location [2024-11-09 01:11:59,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:59,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:59,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 21 [2024-11-09 01:11:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970567554] [2024-11-09 01:11:59,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:59,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 01:11:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 01:11:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=6496, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 01:11:59,456 INFO L87 Difference]: Start difference. First operand 47838 states and 56300 transitions. Second operand has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2024-11-09 01:12:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:08,131 INFO L93 Difference]: Finished difference Result 94840 states and 111030 transitions. [2024-11-09 01:12:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 01:12:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 244 [2024-11-09 01:12:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:08,249 INFO L225 Difference]: With dead ends: 94840 [2024-11-09 01:12:08,249 INFO L226 Difference]: Without dead ends: 47009 [2024-11-09 01:12:08,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 631 SyntacticMatches, 43 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1222, Invalid=13058, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 01:12:08,304 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 1993 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:08,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 685 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 01:12:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47009 states. [2024-11-09 01:12:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47009 to 36266. [2024-11-09 01:12:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36266 states, 30117 states have (on average 1.1528040641498156) internal successors, (34719), 30351 states have internal predecessors, (34719), 3375 states have call successors, (3375), 2617 states have call predecessors, (3375), 2773 states have return successors, (3619), 3298 states have call predecessors, (3619), 3375 states have call successors, (3619) [2024-11-09 01:12:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36266 states to 36266 states and 41713 transitions. [2024-11-09 01:12:13,896 INFO L78 Accepts]: Start accepts. Automaton has 36266 states and 41713 transitions. Word has length 244 [2024-11-09 01:12:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:13,897 INFO L471 AbstractCegarLoop]: Abstraction has 36266 states and 41713 transitions. [2024-11-09 01:12:13,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2024-11-09 01:12:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 36266 states and 41713 transitions. [2024-11-09 01:12:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-11-09 01:12:13,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:13,925 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:13,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 01:12:14,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 01:12:14,125 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:12:14,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -487921781, now seen corresponding path program 1 times [2024-11-09 01:12:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:14,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619947622] [2024-11-09 01:12:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 42 proven. 96 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-09 01:12:14,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:14,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619947622] [2024-11-09 01:12:14,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619947622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371901321] [2024-11-09 01:12:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:14,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:14,559 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:14,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3716544-adc5-45ca-976b-b503b76bcd62/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 01:12:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:14,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:12:14,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 01:12:14,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:12:14,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371901321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:12:14,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:12:14,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 01:12:14,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624178386] [2024-11-09 01:12:14,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:12:14,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:12:14,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:12:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:12:14,854 INFO L87 Difference]: Start difference. First operand 36266 states and 41713 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15)