./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.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_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/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_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/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_5e3da56f-bc61-4fd8-9060-785d9e88479b/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 35b23af90f01e46e9f818578c532dc01a817e343291a24c8592db5f0da05a3c7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:47:22,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:47:22,545 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:47:22,552 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:47:22,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:47:22,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:47:22,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:47:22,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:47:22,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:47:22,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:47:22,587 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:47:22,588 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:47:22,588 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:47:22,589 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:47:22,589 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:47:22,590 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:47:22,590 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:47:22,590 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:47:22,591 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:47:22,591 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:47:22,592 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:47:22,592 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:47:22,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:47:22,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:47:22,594 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:47:22,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:47:22,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:47:22,595 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:47:22,595 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:47:22,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:47:22,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:47:22,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:47:22,600 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:47:22,601 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:47:22,604 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:47:22,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:47:22,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:47:22,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:47:22,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:47:22,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:47:22,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:47:22,606 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:47:22,606 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:47:22,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:47:22,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:47:22,607 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:47:22,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:47:22,608 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_5e3da56f-bc61-4fd8-9060-785d9e88479b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35b23af90f01e46e9f818578c532dc01a817e343291a24c8592db5f0da05a3c7 [2024-11-09 04:47:22,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:47:23,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:47:23,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:47:23,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:47:23,041 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:47:23,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c Unable to find full path for "g++" [2024-11-09 04:47:25,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:47:25,533 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:47:25,534 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c [2024-11-09 04:47:25,547 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/data/a0a2a50d1/f4e60aef04334d0a93e4a9970fc961d1/FLAG2caa850b1 [2024-11-09 04:47:25,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/data/a0a2a50d1/f4e60aef04334d0a93e4a9970fc961d1 [2024-11-09 04:47:25,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:47:25,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:47:25,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:47:25,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:47:25,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:47:25,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:47:25" (1/1) ... [2024-11-09 04:47:25,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb9e2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:25, skipping insertion in model container [2024-11-09 04:47:25,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:47:25" (1/1) ... [2024-11-09 04:47:25,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:47:26,303 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_5e3da56f-bc61-4fd8-9060-785d9e88479b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c[12042,12055] [2024-11-09 04:47:26,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:47:26,329 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:47:26,446 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_5e3da56f-bc61-4fd8-9060-785d9e88479b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c[12042,12055] [2024-11-09 04:47:26,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:47:26,478 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:47:26,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26 WrapperNode [2024-11-09 04:47:26,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:47:26,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:47:26,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:47:26,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:47:26,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,569 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 428 [2024-11-09 04:47:26,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:47:26,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:47:26,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:47:26,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:47:26,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:47:26,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:47:26,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:47:26,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:47:26,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (1/1) ... [2024-11-09 04:47:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:47:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:26,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:47:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:47:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:47:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2024-11-09 04:47:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2024-11-09 04:47:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2024-11-09 04:47:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2024-11-09 04:47:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2024-11-09 04:47:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2024-11-09 04:47:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2024-11-09 04:47:26,761 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2024-11-09 04:47:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2024-11-09 04:47:26,761 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2024-11-09 04:47:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:47:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:47:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:47:26,907 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:47:26,909 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:47:27,643 INFO L? ?]: Removed 108 outVars from TransFormulas that were not future-live. [2024-11-09 04:47:27,643 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:47:27,871 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:47:27,871 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:47:27,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:47:27 BoogieIcfgContainer [2024-11-09 04:47:27,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:47:27,874 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:47:27,874 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:47:27,877 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:47:27,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:47:25" (1/3) ... [2024-11-09 04:47:27,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5f977d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:47:27, skipping insertion in model container [2024-11-09 04:47:27,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:26" (2/3) ... [2024-11-09 04:47:27,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5f977d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:47:27, skipping insertion in model container [2024-11-09 04:47:27,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:47:27" (3/3) ... [2024-11-09 04:47:27,880 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.ufo.BOUNDED-10.pals.c [2024-11-09 04:47:27,899 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:47:27,900 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:47:27,979 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:47:27,988 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;@7478a1f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:47:27,989 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:47:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 96 states have (on average 1.5) internal successors, (144), 100 states have internal predecessors, (144), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 04:47:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:47:28,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:28,005 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:28,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:28,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1224199235, now seen corresponding path program 1 times [2024-11-09 04:47:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617607334] [2024-11-09 04:47:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:28,434 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 04:47:28,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617607334] [2024-11-09 04:47:28,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617607334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:28,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:28,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:47:28,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906065805] [2024-11-09 04:47:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:28,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:47:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:47:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:47:28,466 INFO L87 Difference]: Start difference. First operand has 135 states, 96 states have (on average 1.5) internal successors, (144), 100 states have internal predecessors, (144), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:28,730 INFO L93 Difference]: Finished difference Result 272 states and 449 transitions. [2024-11-09 04:47:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:47:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 04:47:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:28,745 INFO L225 Difference]: With dead ends: 272 [2024-11-09 04:47:28,745 INFO L226 Difference]: Without dead ends: 137 [2024-11-09 04:47:28,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:47:28,758 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 3 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:28,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 543 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:47:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-09 04:47:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-09 04:47:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 101 states have internal predecessors, (143), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 04:47:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 207 transitions. [2024-11-09 04:47:28,857 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 207 transitions. Word has length 15 [2024-11-09 04:47:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:28,858 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 207 transitions. [2024-11-09 04:47:28,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 207 transitions. [2024-11-09 04:47:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 04:47:28,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:28,861 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:28,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:47:28,861 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:28,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1253440269, now seen corresponding path program 1 times [2024-11-09 04:47:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:28,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213131412] [2024-11-09 04:47:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,009 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 04:47:29,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213131412] [2024-11-09 04:47:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213131412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:29,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:47:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948266702] [2024-11-09 04:47:29,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:29,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:47:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:47:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:47:29,015 INFO L87 Difference]: Start difference. First operand 137 states and 207 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:29,176 INFO L93 Difference]: Finished difference Result 290 states and 442 transitions. [2024-11-09 04:47:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:47:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-09 04:47:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:29,181 INFO L225 Difference]: With dead ends: 290 [2024-11-09 04:47:29,182 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 04:47:29,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:47:29,184 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 29 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:29,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 554 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 04:47:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2024-11-09 04:47:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 114 states have internal predecessors, (161), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:47:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 227 transitions. [2024-11-09 04:47:29,221 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 227 transitions. Word has length 16 [2024-11-09 04:47:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:29,221 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 227 transitions. [2024-11-09 04:47:29,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 227 transitions. [2024-11-09 04:47:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 04:47:29,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:29,227 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] [2024-11-09 04:47:29,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:47:29,228 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:29,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -127810834, now seen corresponding path program 1 times [2024-11-09 04:47:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734249796] [2024-11-09 04:47:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,364 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 04:47:29,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:29,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734249796] [2024-11-09 04:47:29,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734249796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:29,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:29,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:47:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179256144] [2024-11-09 04:47:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:29,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:47:29,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:47:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:47:29,368 INFO L87 Difference]: Start difference. First operand 152 states and 227 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:47:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:29,476 INFO L93 Difference]: Finished difference Result 325 states and 494 transitions. [2024-11-09 04:47:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:47:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-11-09 04:47:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:29,479 INFO L225 Difference]: With dead ends: 325 [2024-11-09 04:47:29,480 INFO L226 Difference]: Without dead ends: 183 [2024-11-09 04:47:29,480 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 04:47:29,485 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:29,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 367 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-09 04:47:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2024-11-09 04:47:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.434782608695652) internal successors, (165), 118 states have internal predecessors, (165), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:47:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 231 transitions. [2024-11-09 04:47:29,518 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 231 transitions. Word has length 21 [2024-11-09 04:47:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:29,519 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 231 transitions. [2024-11-09 04:47:29,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:47:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 231 transitions. [2024-11-09 04:47:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:47:29,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:29,520 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 04:47:29,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:47:29,522 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:29,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 908324217, now seen corresponding path program 1 times [2024-11-09 04:47:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:29,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280740808] [2024-11-09 04:47:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,651 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 04:47:29,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:29,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280740808] [2024-11-09 04:47:29,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280740808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:29,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:47:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405428642] [2024-11-09 04:47:29,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:29,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:47:29,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:47:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:47:29,656 INFO L87 Difference]: Start difference. First operand 156 states and 231 transitions. 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:47:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:29,742 INFO L93 Difference]: Finished difference Result 258 states and 383 transitions. [2024-11-09 04:47:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:47:29,744 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-09 04:47:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:29,746 INFO L225 Difference]: With dead ends: 258 [2024-11-09 04:47:29,746 INFO L226 Difference]: Without dead ends: 156 [2024-11-09 04:47:29,748 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 04:47:29,749 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:29,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 371 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-09 04:47:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-09 04:47:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.4086956521739131) internal successors, (162), 118 states have internal predecessors, (162), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:47:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 228 transitions. [2024-11-09 04:47:29,780 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 228 transitions. Word has length 29 [2024-11-09 04:47:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:29,781 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 228 transitions. [2024-11-09 04:47:29,781 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:47:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 228 transitions. [2024-11-09 04:47:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:47:29,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:29,785 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:47:29,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:47:29,785 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:29,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 955374232, now seen corresponding path program 1 times [2024-11-09 04:47:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75147204] [2024-11-09 04:47:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:29,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75147204] [2024-11-09 04:47:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75147204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:47:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107649286] [2024-11-09 04:47:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:29,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:47:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:47:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:47:29,948 INFO L87 Difference]: Start difference. First operand 156 states and 228 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:47:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:30,067 INFO L93 Difference]: Finished difference Result 301 states and 443 transitions. [2024-11-09 04:47:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:47:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-09 04:47:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:30,070 INFO L225 Difference]: With dead ends: 301 [2024-11-09 04:47:30,070 INFO L226 Difference]: Without dead ends: 158 [2024-11-09 04:47:30,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:47:30,074 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:30,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 730 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-09 04:47:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2024-11-09 04:47:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.4) internal successors, (161), 118 states have internal predecessors, (161), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:47:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 227 transitions. [2024-11-09 04:47:30,094 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 227 transitions. Word has length 32 [2024-11-09 04:47:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:30,095 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 227 transitions. [2024-11-09 04:47:30,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:47:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 227 transitions. [2024-11-09 04:47:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:47:30,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:30,098 INFO L215 NwaCegarLoop]: trace histogram [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 04:47:30,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:47:30,099 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:30,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1556043674, now seen corresponding path program 1 times [2024-11-09 04:47:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030807951] [2024-11-09 04:47:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:30,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030807951] [2024-11-09 04:47:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030807951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818298538] [2024-11-09 04:47:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:30,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:30,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:30,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:30,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:47:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:30,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:47:30,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:30,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818298538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:30,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371723904] [2024-11-09 04:47:30,525 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:47:30,526 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:30,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:30,536 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:30,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:31,978 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-09 04:47:33,672 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-09 04:47:33,727 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1371723904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2024-11-09 04:47:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196016572] [2024-11-09 04:47:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:36,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:47:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:47:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-09 04:47:36,998 INFO L87 Difference]: Start difference. First operand 156 states and 227 transitions. Second operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:47:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:37,816 INFO L93 Difference]: Finished difference Result 350 states and 503 transitions. [2024-11-09 04:47:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:47:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2024-11-09 04:47:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:37,820 INFO L225 Difference]: With dead ends: 350 [2024-11-09 04:47:37,821 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 04:47:37,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-09 04:47:37,825 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 90 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:37,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 578 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:47:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 04:47:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2024-11-09 04:47:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 04:47:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 279 transitions. [2024-11-09 04:47:37,858 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 279 transitions. Word has length 35 [2024-11-09 04:47:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:37,858 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 279 transitions. [2024-11-09 04:47:37,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:47:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 279 transitions. [2024-11-09 04:47:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:47:37,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:37,864 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:47:37,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:47:38,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:38,065 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:38,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1195694965, now seen corresponding path program 1 times [2024-11-09 04:47:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:38,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919624498] [2024-11-09 04:47:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:38,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919624498] [2024-11-09 04:47:38,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919624498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:38,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086852827] [2024-11-09 04:47:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:38,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:38,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:38,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:38,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:47:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:38,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:47:38,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:38,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086852827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68950177] [2024-11-09 04:47:38,348 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 04:47:38,348 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:38,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:38,349 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:38,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:38,956 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-09 04:47:40,200 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-09 04:47:40,330 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [68950177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2024-11-09 04:47:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288653461] [2024-11-09 04:47:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:43,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:47:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:47:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:47:43,608 INFO L87 Difference]: Start difference. First operand 199 states and 279 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:47:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:44,843 INFO L93 Difference]: Finished difference Result 391 states and 554 transitions. [2024-11-09 04:47:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:47:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2024-11-09 04:47:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:44,846 INFO L225 Difference]: With dead ends: 391 [2024-11-09 04:47:44,847 INFO L226 Difference]: Without dead ends: 209 [2024-11-09 04:47:44,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:47:44,849 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 82 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:44,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 936 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:47:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-09 04:47:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2024-11-09 04:47:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 153 states have (on average 1.3660130718954249) internal successors, (209), 156 states have internal predecessors, (209), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 04:47:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 283 transitions. [2024-11-09 04:47:44,882 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 283 transitions. Word has length 35 [2024-11-09 04:47:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:44,883 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 283 transitions. [2024-11-09 04:47:44,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:47:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 283 transitions. [2024-11-09 04:47:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:47:44,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:44,886 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:47:44,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:47:45,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:45,087 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:45,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 785332485, now seen corresponding path program 1 times [2024-11-09 04:47:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:45,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732099432] [2024-11-09 04:47:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 04:47:45,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732099432] [2024-11-09 04:47:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732099432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512842174] [2024-11-09 04:47:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:45,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:47:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:45,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:47:45,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:47:45,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 04:47:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512842174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:45,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880568196] [2024-11-09 04:47:45,393 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2024-11-09 04:47:45,393 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:45,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:45,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:45,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:46,865 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-09 04:47:47,956 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-09 04:47:47,985 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [880568196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:51,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 25 [2024-11-09 04:47:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865262317] [2024-11-09 04:47:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:51,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:47:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:47:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:47:51,923 INFO L87 Difference]: Start difference. First operand 204 states and 283 transitions. Second operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:47:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:54,006 INFO L93 Difference]: Finished difference Result 426 states and 594 transitions. [2024-11-09 04:47:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:47:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-09 04:47:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:54,009 INFO L225 Difference]: With dead ends: 426 [2024-11-09 04:47:54,009 INFO L226 Difference]: Without dead ends: 240 [2024-11-09 04:47:54,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:47:54,012 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 82 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:54,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1150 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 04:47:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-09 04:47:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2024-11-09 04:47:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 171 states have (on average 1.3625730994152048) internal successors, (233), 174 states have internal predecessors, (233), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 04:47:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 313 transitions. [2024-11-09 04:47:54,056 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 313 transitions. Word has length 51 [2024-11-09 04:47:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:54,056 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 313 transitions. [2024-11-09 04:47:54,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:47:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 313 transitions. [2024-11-09 04:47:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 04:47:54,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:54,059 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:47:54,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:47:54,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:54,260 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:54,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 174527742, now seen corresponding path program 1 times [2024-11-09 04:47:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:54,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855034888] [2024-11-09 04:47:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 04:47:54,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855034888] [2024-11-09 04:47:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855034888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834653660] [2024-11-09 04:47:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:54,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:47:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:54,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:47:54,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:47:54,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 04:47:54,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834653660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52157792] [2024-11-09 04:47:54,641 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2024-11-09 04:47:54,642 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:54,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:54,642 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:54,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:55,714 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-09 04:47:56,908 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 84 for LOIs [2024-11-09 04:47:57,224 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [52157792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:02,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:02,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 25 [2024-11-09 04:48:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568056124] [2024-11-09 04:48:02,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:02,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:48:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:48:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:48:02,332 INFO L87 Difference]: Start difference. First operand 226 states and 313 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:48:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:04,124 INFO L93 Difference]: Finished difference Result 417 states and 584 transitions. [2024-11-09 04:48:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:48:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-11-09 04:48:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:04,127 INFO L225 Difference]: With dead ends: 417 [2024-11-09 04:48:04,127 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 04:48:04,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:48:04,129 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 81 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:04,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 796 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 04:48:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 04:48:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2024-11-09 04:48:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 173 states have internal predecessors, (229), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 04:48:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 307 transitions. [2024-11-09 04:48:04,181 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 307 transitions. Word has length 52 [2024-11-09 04:48:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:04,182 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 307 transitions. [2024-11-09 04:48:04,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:48:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 307 transitions. [2024-11-09 04:48:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 04:48:04,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:04,184 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:48:04,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:48:04,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:04,385 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:04,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1569087408, now seen corresponding path program 1 times [2024-11-09 04:48:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918256089] [2024-11-09 04:48:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:48:04,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918256089] [2024-11-09 04:48:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918256089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105759780] [2024-11-09 04:48:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:04,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:04,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:04,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:48:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:04,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:48:04,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:48:04,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:48:04,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105759780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:04,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331555647] [2024-11-09 04:48:04,821 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:48:04,821 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:04,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:04,822 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:04,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:06,158 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:48:07,219 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-09 04:48:07,257 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 57 for LOIs [2024-11-09 04:48:07,269 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1331555647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:12,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [4, 4, 4] total 31 [2024-11-09 04:48:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113968791] [2024-11-09 04:48:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:12,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 04:48:12,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 04:48:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-11-09 04:48:12,902 INFO L87 Difference]: Start difference. First operand 224 states and 307 transitions. Second operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:48:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:17,204 INFO L93 Difference]: Finished difference Result 392 states and 539 transitions. [2024-11-09 04:48:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:48:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.25) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2024-11-09 04:48:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:17,208 INFO L225 Difference]: With dead ends: 392 [2024-11-09 04:48:17,208 INFO L226 Difference]: Without dead ends: 238 [2024-11-09 04:48:17,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 04:48:17,210 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 74 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:17,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 934 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:48:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-09 04:48:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 217. [2024-11-09 04:48:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.3333333333333333) internal successors, (220), 168 states have internal predecessors, (220), 38 states have call successors, (38), 13 states have call predecessors, (38), 13 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 04:48:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 296 transitions. [2024-11-09 04:48:17,254 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 296 transitions. Word has length 67 [2024-11-09 04:48:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:17,255 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 296 transitions. [2024-11-09 04:48:17,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.25) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:48:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 296 transitions. [2024-11-09 04:48:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 04:48:17,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:17,257 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:48:17,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:48:17,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:48:17,458 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:17,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash 873310050, now seen corresponding path program 1 times [2024-11-09 04:48:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205140561] [2024-11-09 04:48:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:48:17,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:17,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205140561] [2024-11-09 04:48:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205140561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098519310] [2024-11-09 04:48:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:17,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:17,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:17,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:48:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:17,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:48:17,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:48:17,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:48:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098519310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:17,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339883269] [2024-11-09 04:48:17,841 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-09 04:48:17,842 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:17,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:17,842 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:17,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:19,644 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 152 for LOIs [2024-11-09 04:48:19,728 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:48:20,488 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-09 04:48:20,493 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1339883269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:28,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:28,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [4, 4, 4] total 30 [2024-11-09 04:48:28,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221047681] [2024-11-09 04:48:28,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:28,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:48:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:48:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-11-09 04:48:28,851 INFO L87 Difference]: Start difference. First operand 217 states and 296 transitions. Second operand has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:48:38,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:48:43,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:48:47,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:48:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:51,904 INFO L93 Difference]: Finished difference Result 392 states and 549 transitions. [2024-11-09 04:48:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 04:48:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2024-11-09 04:48:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:51,909 INFO L225 Difference]: With dead ends: 392 [2024-11-09 04:48:51,910 INFO L226 Difference]: Without dead ends: 291 [2024-11-09 04:48:51,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=208, Invalid=1511, Unknown=3, NotChecked=0, Total=1722 [2024-11-09 04:48:51,912 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 96 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:51,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 2320 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1763 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2024-11-09 04:48:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-11-09 04:48:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 222. [2024-11-09 04:48:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 172 states have internal predecessors, (224), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 04:48:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 302 transitions. [2024-11-09 04:48:51,985 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 302 transitions. Word has length 79 [2024-11-09 04:48:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:51,987 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 302 transitions. [2024-11-09 04:48:51,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:48:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 302 transitions. [2024-11-09 04:48:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 04:48:51,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:51,990 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 04:48:52,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:48:52,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:48:52,190 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:52,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash 607090395, now seen corresponding path program 1 times [2024-11-09 04:48:52,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:52,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879198677] [2024-11-09 04:48:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:52,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:48:52,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:52,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879198677] [2024-11-09 04:48:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879198677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267558844] [2024-11-09 04:48:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:52,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:52,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:48:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:52,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:48:52,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 04:48:52,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:48:52,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267558844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309131635] [2024-11-09 04:48:52,637 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2024-11-09 04:48:52,638 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:52,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:52,638 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:52,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:55,874 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 61 for LOIs [2024-11-09 04:48:55,963 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:48:57,160 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-09 04:48:57,166 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1309131635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:49:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:49:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 4, 4] total 34 [2024-11-09 04:49:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560587119] [2024-11-09 04:49:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:49:05,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 04:49:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 04:49:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:49:05,376 INFO L87 Difference]: Start difference. First operand 222 states and 302 transitions. Second operand has 30 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 21 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 04:49:14,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:49:16,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:49:19,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:49:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:27,014 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2024-11-09 04:49:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 04:49:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 21 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2024-11-09 04:49:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:27,017 INFO L225 Difference]: With dead ends: 400 [2024-11-09 04:49:27,018 INFO L226 Difference]: Without dead ends: 299 [2024-11-09 04:49:27,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 220 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=226, Invalid=1934, Unknown=2, NotChecked=0, Total=2162 [2024-11-09 04:49:27,020 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 168 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:27,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1974 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1770 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2024-11-09 04:49:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-09 04:49:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2024-11-09 04:49:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 175 states have (on average 1.32) internal successors, (231), 179 states have internal predecessors, (231), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 04:49:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 311 transitions. [2024-11-09 04:49:27,061 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 311 transitions. Word has length 85 [2024-11-09 04:49:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:27,062 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 311 transitions. [2024-11-09 04:49:27,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 21 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 04:49:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 311 transitions. [2024-11-09 04:49:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 04:49:27,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:27,064 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:49:27,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:49:27,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:49:27,268 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:27,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1575758532, now seen corresponding path program 1 times [2024-11-09 04:49:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105911653] [2024-11-09 04:49:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:27,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:49:27,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105911653] [2024-11-09 04:49:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105911653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:49:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115045617] [2024-11-09 04:49:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:27,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:27,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:49:27,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:49:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:49:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:27,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:49:27,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:49:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:49:27,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:49:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:49:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115045617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:49:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941729091] [2024-11-09 04:49:27,785 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2024-11-09 04:49:27,786 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:49:27,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:49:27,788 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:49:27,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:49:30,732 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:49:30,820 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-09 04:49:31,902 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 79 for LOIs [2024-11-09 04:49:31,964 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [941729091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:49:46,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:49:46,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 4, 4] total 34 [2024-11-09 04:49:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079419519] [2024-11-09 04:49:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:49:46,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 04:49:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 04:49:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1017, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 04:49:46,179 INFO L87 Difference]: Start difference. First operand 231 states and 311 transitions. Second operand has 30 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 04:49:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:57,950 INFO L93 Difference]: Finished difference Result 409 states and 568 transitions. [2024-11-09 04:49:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 04:49:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 92 [2024-11-09 04:49:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:57,954 INFO L225 Difference]: With dead ends: 409 [2024-11-09 04:49:57,954 INFO L226 Difference]: Without dead ends: 306 [2024-11-09 04:49:57,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=222, Invalid=2033, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 04:49:57,956 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 170 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:57,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1641 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 04:49:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-09 04:49:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 239. [2024-11-09 04:49:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 181 states have (on average 1.3093922651933703) internal successors, (237), 185 states have internal predecessors, (237), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-09 04:49:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 319 transitions. [2024-11-09 04:49:58,008 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 319 transitions. Word has length 92 [2024-11-09 04:49:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:58,009 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 319 transitions. [2024-11-09 04:49:58,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 04:49:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 319 transitions. [2024-11-09 04:49:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 04:49:58,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:58,010 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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 04:49:58,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:49:58,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:58,211 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:58,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1976629746, now seen corresponding path program 1 times [2024-11-09 04:49:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716037673] [2024-11-09 04:49:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 04:49:58,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716037673] [2024-11-09 04:49:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716037673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:49:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639676618] [2024-11-09 04:49:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:58,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:49:58,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:49:58,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:49:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:58,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:49:58,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:49:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:49:58,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:49:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 04:49:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639676618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:49:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473991146] [2024-11-09 04:49:58,733 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2024-11-09 04:49:58,733 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:49:58,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:49:58,733 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:49:58,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:50:05,290 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:50:05,403 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:50:06,220 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-09 04:50:06,226 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:50:24,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [473991146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:50:24,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:50:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [4, 4, 4] total 38 [2024-11-09 04:50:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385762218] [2024-11-09 04:50:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:50:24,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 04:50:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:24,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 04:50:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 04:50:24,406 INFO L87 Difference]: Start difference. First operand 239 states and 319 transitions. Second operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 04:50:26,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:29,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:34,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:37,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:40,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:42,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:47,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:51,826 INFO L93 Difference]: Finished difference Result 373 states and 505 transitions. [2024-11-09 04:50:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 04:50:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 98 [2024-11-09 04:50:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:51,829 INFO L225 Difference]: With dead ends: 373 [2024-11-09 04:50:51,830 INFO L226 Difference]: Without dead ends: 272 [2024-11-09 04:50:51,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=225, Invalid=2224, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 04:50:51,833 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 132 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:51,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1507 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1450 Invalid, 7 Unknown, 0 Unchecked, 20.3s Time] [2024-11-09 04:50:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-09 04:50:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 243. [2024-11-09 04:50:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 185 states have (on average 1.3027027027027027) internal successors, (241), 188 states have internal predecessors, (241), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-09 04:50:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 323 transitions. [2024-11-09 04:50:51,903 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 323 transitions. Word has length 98 [2024-11-09 04:50:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:51,904 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 323 transitions. [2024-11-09 04:50:51,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 04:50:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 323 transitions. [2024-11-09 04:50:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 04:50:51,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:51,907 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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 04:50:51,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:50:52,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:50:52,108 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:52,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1086278307, now seen corresponding path program 1 times [2024-11-09 04:50:52,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:52,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430240486] [2024-11-09 04:50:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:52,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:50:52,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430240486] [2024-11-09 04:50:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430240486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:50:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970275246] [2024-11-09 04:50:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:52,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:52,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:50:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:52,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:50:52,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 04:50:52,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:50:52,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970275246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745177577] [2024-11-09 04:50:52,693 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-09 04:50:52,693 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:50:52,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:50:52,694 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:50:52,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:50:56,916 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:50:57,066 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:50:57,940 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-09 04:50:57,960 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 68 for LOIs [2024-11-09 04:50:57,976 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:07,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1745177577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:07,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:07,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [4, 4, 4] total 45 [2024-11-09 04:51:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340770369] [2024-11-09 04:51:07,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:07,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:51:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:51:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 04:51:07,689 INFO L87 Difference]: Start difference. First operand 243 states and 323 transitions. Second operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 30 states have internal predecessors, (46), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:51:17,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:51:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:24,705 INFO L93 Difference]: Finished difference Result 483 states and 676 transitions. [2024-11-09 04:51:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 04:51:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 30 states have internal predecessors, (46), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 109 [2024-11-09 04:51:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:24,709 INFO L225 Difference]: With dead ends: 483 [2024-11-09 04:51:24,710 INFO L226 Difference]: Without dead ends: 382 [2024-11-09 04:51:24,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 281 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=322, Invalid=3709, Unknown=1, NotChecked=0, Total=4032 [2024-11-09 04:51:24,712 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 263 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 3584 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3584 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:24,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 2098 Invalid, 3635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3584 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2024-11-09 04:51:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-09 04:51:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 266. [2024-11-09 04:51:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 200 states have (on average 1.3) internal successors, (260), 204 states have internal predecessors, (260), 48 states have call successors, (48), 17 states have call predecessors, (48), 17 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 04:51:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 356 transitions. [2024-11-09 04:51:24,814 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 356 transitions. Word has length 109 [2024-11-09 04:51:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:24,814 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 356 transitions. [2024-11-09 04:51:24,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 30 states have internal predecessors, (46), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:51:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 356 transitions. [2024-11-09 04:51:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 04:51:24,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:24,817 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2024-11-09 04:51:24,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:51:25,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:51:25,021 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:25,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 143797130, now seen corresponding path program 1 times [2024-11-09 04:51:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:25,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358687483] [2024-11-09 04:51:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:51:25,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358687483] [2024-11-09 04:51:25,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358687483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310730228] [2024-11-09 04:51:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:25,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:25,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:25,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:51:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:25,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:51:25,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 04:51:25,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:51:25,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310730228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878284355] [2024-11-09 04:51:25,569 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-09 04:51:25,569 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:25,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:25,570 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:25,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:32,048 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:51:32,197 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:51:33,036 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 54 for LOIs [2024-11-09 04:51:33,093 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [878284355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [4, 4, 4] total 44 [2024-11-09 04:51:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064415946] [2024-11-09 04:51:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:49,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 04:51:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 04:51:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 04:51:49,234 INFO L87 Difference]: Start difference. First operand 266 states and 356 transitions. Second operand has 40 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:52:03,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:52:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:08,051 INFO L93 Difference]: Finished difference Result 467 states and 642 transitions. [2024-11-09 04:52:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 04:52:08,051 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 111 [2024-11-09 04:52:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:08,053 INFO L225 Difference]: With dead ends: 467 [2024-11-09 04:52:08,054 INFO L226 Difference]: Without dead ends: 346 [2024-11-09 04:52:08,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=286, Invalid=3372, Unknown=2, NotChecked=0, Total=3660 [2024-11-09 04:52:08,056 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 207 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 3608 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 3645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:08,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 2339 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3608 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2024-11-09 04:52:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-09 04:52:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 284. [2024-11-09 04:52:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 213 states have (on average 1.295774647887324) internal successors, (276), 217 states have internal predecessors, (276), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-09 04:52:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 378 transitions. [2024-11-09 04:52:08,108 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 378 transitions. Word has length 111 [2024-11-09 04:52:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:08,109 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 378 transitions. [2024-11-09 04:52:08,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:52:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 378 transitions. [2024-11-09 04:52:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 04:52:08,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:08,111 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:08,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:52:08,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:08,312 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:52:08,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 286026294, now seen corresponding path program 1 times [2024-11-09 04:52:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844080456] [2024-11-09 04:52:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:52:08,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:08,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844080456] [2024-11-09 04:52:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844080456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159778007] [2024-11-09 04:52:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:08,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:52:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:08,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:52:08,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 04:52:08,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:52:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159778007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:08,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108167573] [2024-11-09 04:52:08,772 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2024-11-09 04:52:08,773 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:08,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:08,773 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:08,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:14,708 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:52:14,856 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:52:15,811 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-09 04:52:15,828 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 77 for LOIs [2024-11-09 04:52:15,992 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:36,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2108167573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:52:36,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:36,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [4, 4, 4] total 50 [2024-11-09 04:52:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386582817] [2024-11-09 04:52:36,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:52:36,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 04:52:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 04:52:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2298, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 04:52:36,300 INFO L87 Difference]: Start difference. First operand 284 states and 378 transitions. Second operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:52:46,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:52:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:54,562 INFO L93 Difference]: Finished difference Result 482 states and 661 transitions. [2024-11-09 04:52:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 04:52:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 116 [2024-11-09 04:52:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:54,565 INFO L225 Difference]: With dead ends: 482 [2024-11-09 04:52:54,566 INFO L226 Difference]: Without dead ends: 366 [2024-11-09 04:52:54,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 298 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=321, Invalid=4508, Unknown=1, NotChecked=0, Total=4830 [2024-11-09 04:52:54,569 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 192 mSDsluCounter, 2684 mSDsCounter, 0 mSdLazyCounter, 5165 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 5205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:54,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2823 Invalid, 5205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 5165 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2024-11-09 04:52:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-09 04:52:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 303. [2024-11-09 04:52:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 226 states have (on average 1.3008849557522124) internal successors, (294), 230 states have internal predecessors, (294), 56 states have call successors, (56), 20 states have call predecessors, (56), 20 states have return successors, (56), 55 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-09 04:52:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 406 transitions. [2024-11-09 04:52:54,642 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 406 transitions. Word has length 116 [2024-11-09 04:52:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:54,643 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 406 transitions. [2024-11-09 04:52:54,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:52:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 406 transitions. [2024-11-09 04:52:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 04:52:54,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:54,645 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:54,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:54,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:52:54,846 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:52:54,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 474287357, now seen corresponding path program 1 times [2024-11-09 04:52:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:54,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258459491] [2024-11-09 04:52:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:52:54,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258459491] [2024-11-09 04:52:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258459491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595062344] [2024-11-09 04:52:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:54,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:54,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:54,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:55,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:52:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:55,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:52:55,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 04:52:55,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-09 04:52:55,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595062344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490777824] [2024-11-09 04:52:55,320 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2024-11-09 04:52:55,320 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:55,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:55,321 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:55,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:58,976 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:52:59,085 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:52:59,785 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-09 04:52:59,802 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 78 for LOIs [2024-11-09 04:52:59,937 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [490777824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:53:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:09,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [4, 4, 4] total 48 [2024-11-09 04:53:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396655736] [2024-11-09 04:53:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:53:09,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 04:53:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 04:53:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 04:53:09,690 INFO L87 Difference]: Start difference. First operand 303 states and 406 transitions. Second operand has 44 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:53:17,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:53:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:23,848 INFO L93 Difference]: Finished difference Result 469 states and 644 transitions. [2024-11-09 04:53:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 04:53:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 116 [2024-11-09 04:53:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:23,852 INFO L225 Difference]: With dead ends: 469 [2024-11-09 04:53:23,852 INFO L226 Difference]: Without dead ends: 368 [2024-11-09 04:53:23,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 299 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=311, Invalid=4245, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:53:23,855 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 229 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3451 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3451 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:23,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2070 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3451 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2024-11-09 04:53:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-09 04:53:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 317. [2024-11-09 04:53:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 235 states have (on average 1.3021276595744682) internal successors, (306), 240 states have internal predecessors, (306), 60 states have call successors, (60), 21 states have call predecessors, (60), 21 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-09 04:53:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 426 transitions. [2024-11-09 04:53:23,938 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 426 transitions. Word has length 116 [2024-11-09 04:53:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:23,939 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 426 transitions. [2024-11-09 04:53:23,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:53:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 426 transitions. [2024-11-09 04:53:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 04:53:23,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:23,941 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:23,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:24,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:53:24,142 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:53:24,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1034627100, now seen corresponding path program 1 times [2024-11-09 04:53:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:24,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165680667] [2024-11-09 04:53:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-09 04:53:24,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165680667] [2024-11-09 04:53:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165680667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:24,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634922690] [2024-11-09 04:53:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:24,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:24,330 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:53:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:24,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:53:24,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-09 04:53:24,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-09 04:53:24,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634922690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:24,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426027910] [2024-11-09 04:53:24,665 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2024-11-09 04:53:24,665 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:24,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:24,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:24,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:25,239 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 68 for LOIs [2024-11-09 04:53:25,868 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 68 for LOIs [2024-11-09 04:53:25,900 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1426027910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:53:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:28,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 21 [2024-11-09 04:53:28,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947451371] [2024-11-09 04:53:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:53:28,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:53:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:53:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-09 04:53:28,810 INFO L87 Difference]: Start difference. First operand 317 states and 426 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:53:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:30,538 INFO L93 Difference]: Finished difference Result 620 states and 837 transitions. [2024-11-09 04:53:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:53:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 119 [2024-11-09 04:53:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:30,541 INFO L225 Difference]: With dead ends: 620 [2024-11-09 04:53:30,541 INFO L226 Difference]: Without dead ends: 327 [2024-11-09 04:53:30,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:53:30,543 INFO L432 NwaCegarLoop]: 165 mSDtfsCounter, 96 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:30,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 828 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:53:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-09 04:53:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 319. [2024-11-09 04:53:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.2995780590717299) internal successors, (308), 242 states have internal predecessors, (308), 60 states have call successors, (60), 21 states have call predecessors, (60), 21 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-09 04:53:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 428 transitions. [2024-11-09 04:53:30,635 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 428 transitions. Word has length 119 [2024-11-09 04:53:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:30,636 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 428 transitions. [2024-11-09 04:53:30,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:53:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 428 transitions. [2024-11-09 04:53:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 04:53:30,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:30,637 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 04:53:30,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:30,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:30,838 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:53:30,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -108300111, now seen corresponding path program 1 times [2024-11-09 04:53:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666846290] [2024-11-09 04:53:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-09 04:53:31,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666846290] [2024-11-09 04:53:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666846290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030155674] [2024-11-09 04:53:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:31,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:31,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:53:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:31,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:53:31,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-09 04:53:31,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-09 04:53:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030155674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679215744] [2024-11-09 04:53:31,412 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2024-11-09 04:53:31,413 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:31,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:31,413 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:31,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:34,295 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-09 04:53:34,414 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:53:35,036 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-09 04:53:35,161 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1679215744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:53:44,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:44,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-09 04:53:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690540487] [2024-11-09 04:53:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:53:44,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 04:53:44,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:44,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 04:53:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2172, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 04:53:44,286 INFO L87 Difference]: Start difference. First operand 319 states and 428 transitions. Second operand has 45 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 04:53:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:54,807 INFO L93 Difference]: Finished difference Result 511 states and 701 transitions. [2024-11-09 04:53:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 04:53:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 121 [2024-11-09 04:53:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:54,809 INFO L225 Difference]: With dead ends: 511 [2024-11-09 04:53:54,810 INFO L226 Difference]: Without dead ends: 342 [2024-11-09 04:53:54,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=372, Invalid=4598, Unknown=0, NotChecked=0, Total=4970 [2024-11-09 04:53:54,813 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 120 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 4421 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 4444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:54,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1796 Invalid, 4444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4421 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 04:53:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-09 04:53:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 325. [2024-11-09 04:53:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 242 states have (on average 1.2933884297520661) internal successors, (313), 247 states have internal predecessors, (313), 60 states have call successors, (60), 22 states have call predecessors, (60), 22 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-09 04:53:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 433 transitions. [2024-11-09 04:53:54,887 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 433 transitions. Word has length 121 [2024-11-09 04:53:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:54,888 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 433 transitions. [2024-11-09 04:53:54,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 04:53:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 433 transitions. [2024-11-09 04:53:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 04:53:54,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:54,890 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1] [2024-11-09 04:53:54,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:55,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-09 04:53:55,091 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:53:55,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2113847376, now seen corresponding path program 1 times [2024-11-09 04:53:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:55,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164986065] [2024-11-09 04:53:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:55,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 04:53:55,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164986065] [2024-11-09 04:53:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164986065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107432874] [2024-11-09 04:53:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:55,239 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:55,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:53:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:55,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:53:55,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 04:53:55,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 04:53:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107432874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793751456] [2024-11-09 04:53:55,596 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2024-11-09 04:53:55,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:55,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:55,597 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:55,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:58,060 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:53:58,153 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:53:58,865 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 67 for LOIs [2024-11-09 04:53:58,883 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 70 for LOIs [2024-11-09 04:53:59,036 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 78 for LOIs [2024-11-09 04:53:59,170 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:54:10,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1793751456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:54:10,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:54:10,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [4, 4, 4] total 58 [2024-11-09 04:54:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700248715] [2024-11-09 04:54:10,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:54:10,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 04:54:10,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:54:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 04:54:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3098, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 04:54:10,400 INFO L87 Difference]: Start difference. First operand 325 states and 433 transitions. Second operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 40 states have internal predecessors, (59), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-09 04:54:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:54:22,004 INFO L93 Difference]: Finished difference Result 455 states and 615 transitions. [2024-11-09 04:54:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 04:54:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 40 states have internal predecessors, (59), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 124 [2024-11-09 04:54:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:54:22,008 INFO L225 Difference]: With dead ends: 455 [2024-11-09 04:54:22,009 INFO L226 Difference]: Without dead ends: 343 [2024-11-09 04:54:22,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 312 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=417, Invalid=6389, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 04:54:22,012 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 160 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 4251 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:54:22,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1491 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4251 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 04:54:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-09 04:54:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 325. [2024-11-09 04:54:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 243 states have (on average 1.2798353909465021) internal successors, (311), 248 states have internal predecessors, (311), 58 states have call successors, (58), 23 states have call predecessors, (58), 23 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-09 04:54:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 427 transitions. [2024-11-09 04:54:22,076 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 427 transitions. Word has length 124 [2024-11-09 04:54:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:54:22,077 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 427 transitions. [2024-11-09 04:54:22,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 40 states have internal predecessors, (59), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-09 04:54:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 427 transitions. [2024-11-09 04:54:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-09 04:54:22,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:54:22,078 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2024-11-09 04:54:22,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 04:54:22,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 04:54:22,279 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:54:22,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:54:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1603319650, now seen corresponding path program 1 times [2024-11-09 04:54:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:54:22,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678384245] [2024-11-09 04:54:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:54:22,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:54:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:54:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-09 04:54:22,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:54:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678384245] [2024-11-09 04:54:22,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678384245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:54:22,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229607466] [2024-11-09 04:54:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:54:22,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:54:22,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:54:22,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:54:22,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:54:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:54:22,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:54:22,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:54:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-09 04:54:22,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:54:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-09 04:54:22,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229607466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:54:22,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457838199] [2024-11-09 04:54:22,807 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 04:54:22,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:54:22,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:54:22,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:54:22,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:54:25,531 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:54:25,623 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:54:26,407 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 20 for LOIs [2024-11-09 04:54:26,455 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 99 for LOIs [2024-11-09 04:54:26,481 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:54:37,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1457838199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:54:37,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:54:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 54 [2024-11-09 04:54:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909761542] [2024-11-09 04:54:37,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:54:37,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 04:54:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:54:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 04:54:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2668, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 04:54:37,244 INFO L87 Difference]: Start difference. First operand 325 states and 427 transitions. Second operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 37 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 04:54:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:54:48,958 INFO L93 Difference]: Finished difference Result 516 states and 688 transitions. [2024-11-09 04:54:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 04:54:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 37 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 128 [2024-11-09 04:54:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:54:48,962 INFO L225 Difference]: With dead ends: 516 [2024-11-09 04:54:48,962 INFO L226 Difference]: Without dead ends: 346 [2024-11-09 04:54:48,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 327 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=401, Invalid=5761, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 04:54:48,969 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 159 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 4136 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:54:48,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1615 Invalid, 4178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4136 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 04:54:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-09 04:54:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 329. [2024-11-09 04:54:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 246 states have (on average 1.2764227642276422) internal successors, (314), 251 states have internal predecessors, (314), 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 04:54:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 430 transitions. [2024-11-09 04:54:49,082 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 430 transitions. Word has length 128 [2024-11-09 04:54:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:54:49,083 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 430 transitions. [2024-11-09 04:54:49,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 37 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 04:54:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 430 transitions. [2024-11-09 04:54:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 04:54:49,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:54:49,085 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-09 04:54:49,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 04:54:49,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 04:54:49,286 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:54:49,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:54:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash 23850807, now seen corresponding path program 1 times [2024-11-09 04:54:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:54:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832732424] [2024-11-09 04:54:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:54:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:54:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:54:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 04:54:49,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:54:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832732424] [2024-11-09 04:54:49,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832732424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:54:49,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592518483] [2024-11-09 04:54:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:54:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:54:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:54:49,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:54:49,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:54:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:54:49,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:54:49,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:54:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 04:54:49,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:54:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 04:54:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592518483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:54:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740843267] [2024-11-09 04:54:49,885 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2024-11-09 04:54:49,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:54:49,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:54:49,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:54:49,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:54:52,826 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:54:52,918 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:54:53,590 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 81 for LOIs [2024-11-09 04:54:53,636 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-09 04:54:53,724 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 77 for LOIs [2024-11-09 04:54:53,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:07,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30338#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ ~votedValue_History_1~0 1)) (= (+ ~votedValue_History_0~0 1) 0) (exists ((|v_ULTIMATE.start_check_#t~ret24#1_26| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_25| Int)) (and (= |v_ULTIMATE.start_check_~tmp___7~0#1_25| 0) (= |v_ULTIMATE.start_check_#t~ret24#1_26| 0))) (= |assert_#in~arg| 0) (= (+ ~g1v_new~0 1) 0) (= ~g2v~0 0) (<= ~votedValue_History_2~0 127) (exists ((|v_ULTIMATE.start_check_#t~ret13#1_49| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_40| Int)) (and (= |v_ULTIMATE.start_check_~tmp___3~0#1_40| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_49|) (<= |v_ULTIMATE.start_check_#t~ret13#1_49| 1) (not (= |v_ULTIMATE.start_check_#t~ret13#1_49| 0)))) (= (+ ~nomsg~0 1) 0) (= ~g3v~0 0) (= (+ ~g3v_new~0 1) 0) (= (+ ~g2v_new~0 1) 0) (= ~g1v~0 0) (= (+ ~VALUE2~0 1) 0) (<= ~votedValue_History_1~0 127) (= (+ ~VALUE3~0 1) 0) (<= 0 (+ ~votedValue_History_2~0 128)) (= (+ ~VALUE1~0 1) 0))' at error location [2024-11-09 04:55:07,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:07,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:07,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-09 04:55:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404770539] [2024-11-09 04:55:07,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:07,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:55:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:55:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 04:55:07,296 INFO L87 Difference]: Start difference. First operand 329 states and 430 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-09 04:55:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:07,572 INFO L93 Difference]: Finished difference Result 778 states and 1043 transitions. [2024-11-09 04:55:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:55:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 130 [2024-11-09 04:55:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:07,576 INFO L225 Difference]: With dead ends: 778 [2024-11-09 04:55:07,576 INFO L226 Difference]: Without dead ends: 460 [2024-11-09 04:55:07,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 328 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 04:55:07,579 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 77 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:07,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 689 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-11-09 04:55:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 442. [2024-11-09 04:55:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 345 states have internal predecessors, (438), 77 states have call successors, (77), 24 states have call predecessors, (77), 24 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2024-11-09 04:55:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 592 transitions. [2024-11-09 04:55:07,750 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 592 transitions. Word has length 130 [2024-11-09 04:55:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:07,750 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 592 transitions. [2024-11-09 04:55:07,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-09 04:55:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 592 transitions. [2024-11-09 04:55:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 04:55:07,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:07,753 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1] [2024-11-09 04:55:07,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:07,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:07,954 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:07,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1027715799, now seen corresponding path program 2 times [2024-11-09 04:55:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562422341] [2024-11-09 04:55:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 04:55:08,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:08,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562422341] [2024-11-09 04:55:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562422341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578260854] [2024-11-09 04:55:08,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:55:08,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:08,158 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:55:08,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:55:08,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:55:08,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:55:08,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-09 04:55:08,428 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:55:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578260854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:08,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:55:08,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:55:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348183979] [2024-11-09 04:55:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:08,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:08,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:55:08,431 INFO L87 Difference]: Start difference. First operand 442 states and 592 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:55:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:08,693 INFO L93 Difference]: Finished difference Result 821 states and 1103 transitions. [2024-11-09 04:55:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:55:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 152 [2024-11-09 04:55:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:08,696 INFO L225 Difference]: With dead ends: 821 [2024-11-09 04:55:08,696 INFO L226 Difference]: Without dead ends: 392 [2024-11-09 04:55:08,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:08,697 INFO L432 NwaCegarLoop]: 170 mSDtfsCounter, 36 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:08,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 473 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2024-11-09 04:55:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2024-11-09 04:55:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 298 states have (on average 1.2651006711409396) internal successors, (377), 303 states have internal predecessors, (377), 69 states have call successors, (69), 24 states have call predecessors, (69), 24 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-09 04:55:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 515 transitions. [2024-11-09 04:55:08,812 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 515 transitions. Word has length 152 [2024-11-09 04:55:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:08,812 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 515 transitions. [2024-11-09 04:55:08,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:55:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 515 transitions. [2024-11-09 04:55:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-09 04:55:08,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:08,815 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:55:08,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 04:55:09,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:09,016 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:09,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2141203181, now seen corresponding path program 1 times [2024-11-09 04:55:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:09,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67606173] [2024-11-09 04:55:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-09 04:55:09,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:09,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67606173] [2024-11-09 04:55:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67606173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203458818] [2024-11-09 04:55:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:09,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:09,208 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:09,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 04:55:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:09,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:55:09,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-09 04:55:09,493 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:55:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203458818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:09,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:55:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:55:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134467377] [2024-11-09 04:55:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:09,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:55:09,496 INFO L87 Difference]: Start difference. First operand 392 states and 515 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:55:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:09,764 INFO L93 Difference]: Finished difference Result 730 states and 972 transitions. [2024-11-09 04:55:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:55:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 156 [2024-11-09 04:55:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:09,767 INFO L225 Difference]: With dead ends: 730 [2024-11-09 04:55:09,767 INFO L226 Difference]: Without dead ends: 374 [2024-11-09 04:55:09,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:09,769 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 49 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:09,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 483 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-09 04:55:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2024-11-09 04:55:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 286 states have (on average 1.2342657342657342) internal successors, (353), 291 states have internal predecessors, (353), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2024-11-09 04:55:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 479 transitions. [2024-11-09 04:55:09,918 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 479 transitions. Word has length 156 [2024-11-09 04:55:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:09,919 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 479 transitions. [2024-11-09 04:55:09,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:55:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 479 transitions. [2024-11-09 04:55:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 04:55:09,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:09,920 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:55:09,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:10,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:10,121 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:10,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1781400214, now seen corresponding path program 1 times [2024-11-09 04:55:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:10,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080724723] [2024-11-09 04:55:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-09 04:55:10,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:10,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080724723] [2024-11-09 04:55:10,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080724723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:10,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279889642] [2024-11-09 04:55:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:10,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:10,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:10,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 04:55:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:10,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:55:10,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-09 04:55:10,626 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:55:10,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279889642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:10,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:55:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-09 04:55:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9990276] [2024-11-09 04:55:10,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:10,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:55:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:55:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:55:10,629 INFO L87 Difference]: Start difference. First operand 374 states and 479 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 04:55:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:10,789 INFO L93 Difference]: Finished difference Result 593 states and 770 transitions. [2024-11-09 04:55:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:55:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 159 [2024-11-09 04:55:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:10,792 INFO L225 Difference]: With dead ends: 593 [2024-11-09 04:55:10,793 INFO L226 Difference]: Without dead ends: 378 [2024-11-09 04:55:10,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 04:55:10,794 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 727 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 04:55:10,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 727 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-09 04:55:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2024-11-09 04:55:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 286 states have (on average 1.2132867132867133) internal successors, (347), 291 states have internal predecessors, (347), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2024-11-09 04:55:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 473 transitions. [2024-11-09 04:55:10,901 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 473 transitions. Word has length 159 [2024-11-09 04:55:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:10,901 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 473 transitions. [2024-11-09 04:55:10,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 04:55:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 473 transitions. [2024-11-09 04:55:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-09 04:55:10,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:10,904 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:55:10,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:11,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 04:55:11,105 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:11,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash 586053886, now seen corresponding path program 1 times [2024-11-09 04:55:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068588254] [2024-11-09 04:55:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2024-11-09 04:55:11,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068588254] [2024-11-09 04:55:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068588254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192491963] [2024-11-09 04:55:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:11,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:11,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:11,319 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:11,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 04:55:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:11,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:55:11,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 119 proven. 13 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-09 04:55:11,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-11-09 04:55:11,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192491963] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:11,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:55:11,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-09 04:55:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343121413] [2024-11-09 04:55:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:11,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:11,808 INFO L87 Difference]: Start difference. First operand 374 states and 473 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 04:55:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:11,981 INFO L93 Difference]: Finished difference Result 612 states and 790 transitions. [2024-11-09 04:55:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:55:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 169 [2024-11-09 04:55:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:11,986 INFO L225 Difference]: With dead ends: 612 [2024-11-09 04:55:11,986 INFO L226 Difference]: Without dead ends: 365 [2024-11-09 04:55:11,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:11,988 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 34 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:11,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 333 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-09 04:55:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2024-11-09 04:55:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 280 states have (on average 1.1964285714285714) internal successors, (335), 285 states have internal predecessors, (335), 60 states have call successors, (60), 24 states have call predecessors, (60), 24 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-09 04:55:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 455 transitions. [2024-11-09 04:55:12,105 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 455 transitions. Word has length 169 [2024-11-09 04:55:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:12,105 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 455 transitions. [2024-11-09 04:55:12,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 04:55:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 455 transitions. [2024-11-09 04:55:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-09 04:55:12,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:12,106 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-09 04:55:12,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 04:55:12,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 04:55:12,307 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:12,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -597774810, now seen corresponding path program 1 times [2024-11-09 04:55:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527563705] [2024-11-09 04:55:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2024-11-09 04:55:12,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:12,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527563705] [2024-11-09 04:55:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527563705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890530735] [2024-11-09 04:55:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:12,512 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:12,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 04:55:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:12,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:55:12,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 145 proven. 33 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-09 04:55:13,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 89 proven. 30 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-11-09 04:55:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890530735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:13,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200788231] [2024-11-09 04:55:13,914 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2024-11-09 04:55:13,914 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:13,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:13,915 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:13,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:17,483 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:55:17,602 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:55:19,354 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 81 for LOIs [2024-11-09 04:55:19,395 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 63 for LOIs [2024-11-09 04:55:19,475 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 58 for LOIs [2024-11-09 04:55:19,503 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:37,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41360#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ ~votedValue_History_1~0 1)) (exists ((|v_ULTIMATE.start_check_#t~ret24#1_35| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_32| Int)) (and (= |v_ULTIMATE.start_check_#t~ret24#1_35| 0) (= |v_ULTIMATE.start_check_~tmp___7~0#1_32| 0))) (= (+ ~votedValue_History_0~0 1) 0) (exists ((|v_ULTIMATE.start_check_~tmp___3~0#1_47| Int) (|v_ULTIMATE.start_check_#t~ret13#1_58| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret13#1_58| 0)) (= |v_ULTIMATE.start_check_~tmp___3~0#1_47| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_58|) (<= |v_ULTIMATE.start_check_#t~ret13#1_58| 1))) (= |assert_#in~arg| 0) (= (+ ~g1v_new~0 1) 0) (= ~g2v~0 0) (<= ~votedValue_History_2~0 127) (= (+ ~nomsg~0 1) 0) (= ~g3v~0 0) (= (+ ~g3v_new~0 1) 0) (= (+ ~g2v_new~0 1) 0) (= ~g1v~0 0) (= (+ ~VALUE2~0 1) 0) (<= ~votedValue_History_1~0 127) (= (+ ~VALUE3~0 1) 0) (<= 0 (+ ~votedValue_History_2~0 128)) (= (+ ~VALUE1~0 1) 0))' at error location [2024-11-09 04:55:37,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:37,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:37,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 22 [2024-11-09 04:55:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010009571] [2024-11-09 04:55:37,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:37,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 04:55:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 04:55:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=6760, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 04:55:37,336 INFO L87 Difference]: Start difference. First operand 365 states and 455 transitions. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 18 states have internal predecessors, (144), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2024-11-09 04:55:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:39,289 INFO L93 Difference]: Finished difference Result 744 states and 961 transitions. [2024-11-09 04:55:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:55:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 18 states have internal predecessors, (144), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) Word has length 190 [2024-11-09 04:55:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:39,292 INFO L225 Difference]: With dead ends: 744 [2024-11-09 04:55:39,292 INFO L226 Difference]: Without dead ends: 446 [2024-11-09 04:55:39,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 482 SyntacticMatches, 13 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=514, Invalid=9788, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 04:55:39,295 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 145 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:39,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 3332 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:55:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-09 04:55:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 430. [2024-11-09 04:55:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 328 states have (on average 1.2164634146341464) internal successors, (399), 334 states have internal predecessors, (399), 72 states have call successors, (72), 29 states have call predecessors, (72), 29 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-09 04:55:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 543 transitions. [2024-11-09 04:55:39,401 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 543 transitions. Word has length 190 [2024-11-09 04:55:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:39,402 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 543 transitions. [2024-11-09 04:55:39,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 18 states have internal predecessors, (144), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2024-11-09 04:55:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 543 transitions. [2024-11-09 04:55:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-09 04:55:39,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:39,404 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 04:55:39,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 04:55:39,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:55:39,609 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:39,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 842254169, now seen corresponding path program 1 times [2024-11-09 04:55:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:39,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756492213] [2024-11-09 04:55:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:39,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-09 04:55:39,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:39,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756492213] [2024-11-09 04:55:39,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756492213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:39,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143513637] [2024-11-09 04:55:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:39,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:39,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 04:55:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:40,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:55:40,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2024-11-09 04:55:40,217 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:55:40,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143513637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:40,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:55:40,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:55:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722043659] [2024-11-09 04:55:40,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:40,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:40,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:55:40,221 INFO L87 Difference]: Start difference. First operand 430 states and 543 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:55:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:40,424 INFO L93 Difference]: Finished difference Result 628 states and 834 transitions. [2024-11-09 04:55:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:55:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 226 [2024-11-09 04:55:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:40,429 INFO L225 Difference]: With dead ends: 628 [2024-11-09 04:55:40,429 INFO L226 Difference]: Without dead ends: 438 [2024-11-09 04:55:40,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:40,431 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 521 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 04:55:40,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 521 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-09 04:55:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2024-11-09 04:55:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 334 states have (on average 1.2095808383233533) internal successors, (404), 340 states have internal predecessors, (404), 72 states have call successors, (72), 31 states have call predecessors, (72), 31 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-09 04:55:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 548 transitions. [2024-11-09 04:55:40,503 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 548 transitions. Word has length 226 [2024-11-09 04:55:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:40,504 INFO L471 AbstractCegarLoop]: Abstraction has 438 states and 548 transitions. [2024-11-09 04:55:40,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:55:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 548 transitions. [2024-11-09 04:55:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2024-11-09 04:55:40,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:40,507 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:55:40,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:40,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 04:55:40,707 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:40,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1495630226, now seen corresponding path program 2 times [2024-11-09 04:55:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153756258] [2024-11-09 04:55:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2024-11-09 04:55:40,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153756258] [2024-11-09 04:55:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153756258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884238165] [2024-11-09 04:55:40,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:55:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:40,958 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:40,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 04:55:41,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:55:41,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:55:41,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:55:41,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-09 04:55:41,300 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:55:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884238165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:41,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:55:41,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:55:41,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460702986] [2024-11-09 04:55:41,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:41,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:41,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:55:41,303 INFO L87 Difference]: Start difference. First operand 438 states and 548 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:55:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:41,472 INFO L93 Difference]: Finished difference Result 644 states and 848 transitions. [2024-11-09 04:55:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:55:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 232 [2024-11-09 04:55:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:41,477 INFO L225 Difference]: With dead ends: 644 [2024-11-09 04:55:41,477 INFO L226 Difference]: Without dead ends: 448 [2024-11-09 04:55:41,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:55:41,479 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 4 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:41,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 523 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-11-09 04:55:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2024-11-09 04:55:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 342 states have (on average 1.2046783625730995) internal successors, (412), 348 states have internal predecessors, (412), 72 states have call successors, (72), 33 states have call predecessors, (72), 33 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-09 04:55:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 556 transitions. [2024-11-09 04:55:41,596 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 556 transitions. Word has length 232 [2024-11-09 04:55:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:41,597 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 556 transitions. [2024-11-09 04:55:41,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:55:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 556 transitions. [2024-11-09 04:55:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-09 04:55:41,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:41,599 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-09 04:55:41,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 04:55:41,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:41,800 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:41,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 494535726, now seen corresponding path program 1 times [2024-11-09 04:55:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406727354] [2024-11-09 04:55:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2024-11-09 04:55:42,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406727354] [2024-11-09 04:55:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406727354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682648373] [2024-11-09 04:55:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:42,049 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 04:55:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:42,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 04:55:42,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 129 proven. 12 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-11-09 04:55:43,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2024-11-09 04:55:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682648373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:45,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043139312] [2024-11-09 04:55:45,223 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2024-11-09 04:55:45,224 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:45,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:45,224 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:45,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:49,160 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-09 04:55:49,269 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:55:50,771 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-09 04:55:50,931 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 125 for LOIs [2024-11-09 04:55:51,119 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:15,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1043139312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:15,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:15,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [5, 22, 20] total 106 [2024-11-09 04:56:15,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090424340] [2024-11-09 04:56:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:15,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 04:56:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 04:56:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=10439, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 04:56:15,575 INFO L87 Difference]: Start difference. First operand 448 states and 556 transitions. Second operand has 65 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-09 04:56:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:34,350 INFO L93 Difference]: Finished difference Result 657 states and 853 transitions. [2024-11-09 04:56:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-09 04:56:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) Word has length 235 [2024-11-09 04:56:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:34,355 INFO L225 Difference]: With dead ends: 657 [2024-11-09 04:56:34,355 INFO L226 Difference]: Without dead ends: 451 [2024-11-09 04:56:34,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 597 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6938 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=1110, Invalid=18072, Unknown=0, NotChecked=0, Total=19182 [2024-11-09 04:56:34,359 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 71 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 6483 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 6501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:34,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2535 Invalid, 6501 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18 Valid, 6483 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2024-11-09 04:56:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-09 04:56:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 448. [2024-11-09 04:56:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 348 states have internal predecessors, (411), 72 states have call successors, (72), 33 states have call predecessors, (72), 33 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-09 04:56:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 555 transitions. [2024-11-09 04:56:34,485 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 555 transitions. Word has length 235 [2024-11-09 04:56:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:34,485 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 555 transitions. [2024-11-09 04:56:34,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-09 04:56:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 555 transitions. [2024-11-09 04:56:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2024-11-09 04:56:34,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:34,488 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 04:56:34,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:34,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:34,689 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:34,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -705825747, now seen corresponding path program 3 times [2024-11-09 04:56:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481439681] [2024-11-09 04:56:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 04:56:34,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:34,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481439681] [2024-11-09 04:56:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481439681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322183833] [2024-11-09 04:56:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:56:34,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:34,961 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:34,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 04:56:35,346 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:56:35,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:56:35,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:35,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2024-11-09 04:56:35,377 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:35,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322183833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:35,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:35,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:56:35,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74735320] [2024-11-09 04:56:35,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:35,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:35,380 INFO L87 Difference]: Start difference. First operand 448 states and 555 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:35,554 INFO L93 Difference]: Finished difference Result 652 states and 847 transitions. [2024-11-09 04:56:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:35,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 239 [2024-11-09 04:56:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:35,557 INFO L225 Difference]: With dead ends: 652 [2024-11-09 04:56:35,558 INFO L226 Difference]: Without dead ends: 446 [2024-11-09 04:56:35,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:35,559 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 5 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:35,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 513 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:56:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-09 04:56:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2024-11-09 04:56:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 342 states have (on average 1.1842105263157894) internal successors, (405), 346 states have internal predecessors, (405), 70 states have call successors, (70), 33 states have call predecessors, (70), 33 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-09 04:56:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 545 transitions. [2024-11-09 04:56:35,681 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 545 transitions. Word has length 239 [2024-11-09 04:56:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:35,682 INFO L471 AbstractCegarLoop]: Abstraction has 446 states and 545 transitions. [2024-11-09 04:56:35,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 545 transitions. [2024-11-09 04:56:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2024-11-09 04:56:35,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:35,685 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 04:56:35,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:35,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:35,885 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:35,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1610198885, now seen corresponding path program 1 times [2024-11-09 04:56:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:35,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98960733] [2024-11-09 04:56:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:35,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2024-11-09 04:56:36,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98960733] [2024-11-09 04:56:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98960733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024295229] [2024-11-09 04:56:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:36,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:36,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:36,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 04:56:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:36,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:36,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-11-09 04:56:36,574 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:36,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024295229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:36,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:36,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:56:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862129164] [2024-11-09 04:56:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:36,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:56:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:56:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:36,577 INFO L87 Difference]: Start difference. First operand 446 states and 545 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:36,744 INFO L93 Difference]: Finished difference Result 591 states and 741 transitions. [2024-11-09 04:56:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:56:36,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 245 [2024-11-09 04:56:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:36,747 INFO L225 Difference]: With dead ends: 591 [2024-11-09 04:56:36,747 INFO L226 Difference]: Without dead ends: 387 [2024-11-09 04:56:36,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 245 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 04:56:36,749 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:36,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 343 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:56:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-09 04:56:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2024-11-09 04:56:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 300 states have (on average 1.15) internal successors, (345), 302 states have internal predecessors, (345), 54 states have call successors, (54), 30 states have call predecessors, (54), 30 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-11-09 04:56:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 453 transitions. [2024-11-09 04:56:36,869 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 453 transitions. Word has length 245 [2024-11-09 04:56:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:36,870 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 453 transitions. [2024-11-09 04:56:36,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 453 transitions. [2024-11-09 04:56:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-09 04:56:36,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:36,873 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:56:36,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:37,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:37,074 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:37,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1978173434, now seen corresponding path program 1 times [2024-11-09 04:56:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974986955] [2024-11-09 04:56:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2024-11-09 04:56:37,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:37,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974986955] [2024-11-09 04:56:37,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974986955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:37,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041375428] [2024-11-09 04:56:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:37,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:37,302 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 04:56:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:37,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:37,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2024-11-09 04:56:37,700 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:37,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041375428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:37,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:37,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:56:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233863628] [2024-11-09 04:56:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:37,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:37,703 INFO L87 Difference]: Start difference. First operand 385 states and 453 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:38,118 INFO L93 Difference]: Finished difference Result 692 states and 869 transitions. [2024-11-09 04:56:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 248 [2024-11-09 04:56:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:38,122 INFO L225 Difference]: With dead ends: 692 [2024-11-09 04:56:38,122 INFO L226 Difference]: Without dead ends: 579 [2024-11-09 04:56:38,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:38,123 INFO L432 NwaCegarLoop]: 370 mSDtfsCounter, 217 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:38,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 732 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:56:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-09 04:56:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 422. [2024-11-09 04:56:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 324 states have (on average 1.1728395061728396) internal successors, (380), 326 states have internal predecessors, (380), 67 states have call successors, (67), 30 states have call predecessors, (67), 30 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2024-11-09 04:56:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 514 transitions. [2024-11-09 04:56:38,245 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 514 transitions. Word has length 248 [2024-11-09 04:56:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:38,246 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 514 transitions. [2024-11-09 04:56:38,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 514 transitions. [2024-11-09 04:56:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-09 04:56:38,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:38,249 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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 04:56:38,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:38,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:38,450 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:38,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash -717332390, now seen corresponding path program 1 times [2024-11-09 04:56:38,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:38,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438099084] [2024-11-09 04:56:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2024-11-09 04:56:38,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:38,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438099084] [2024-11-09 04:56:38,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438099084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:38,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027974326] [2024-11-09 04:56:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:38,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:38,686 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:38,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 04:56:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:39,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:39,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-11-09 04:56:39,101 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027974326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:39,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:56:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029507749] [2024-11-09 04:56:39,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:39,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:39,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:39,103 INFO L87 Difference]: Start difference. First operand 422 states and 514 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:39,310 INFO L93 Difference]: Finished difference Result 598 states and 779 transitions. [2024-11-09 04:56:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 256 [2024-11-09 04:56:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:39,314 INFO L225 Difference]: With dead ends: 598 [2024-11-09 04:56:39,314 INFO L226 Difference]: Without dead ends: 418 [2024-11-09 04:56:39,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:39,316 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 3 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:39,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 454 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:56:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2024-11-09 04:56:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2024-11-09 04:56:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 322 states have (on average 1.1677018633540373) internal successors, (376), 324 states have internal predecessors, (376), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-09 04:56:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 506 transitions. [2024-11-09 04:56:39,436 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 506 transitions. Word has length 256 [2024-11-09 04:56:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:39,437 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 506 transitions. [2024-11-09 04:56:39,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 506 transitions. [2024-11-09 04:56:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-09 04:56:39,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:39,440 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:39,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:39,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:39,641 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:39,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:39,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2040704897, now seen corresponding path program 1 times [2024-11-09 04:56:39,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:39,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180707194] [2024-11-09 04:56:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2024-11-09 04:56:39,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:39,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180707194] [2024-11-09 04:56:39,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180707194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:39,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315965169] [2024-11-09 04:56:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:39,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:39,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:39,886 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:39,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 04:56:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:40,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:40,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2024-11-09 04:56:40,286 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315965169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:40,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:56:40,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15403330] [2024-11-09 04:56:40,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:40,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:40,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:40,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:40,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:40,289 INFO L87 Difference]: Start difference. First operand 418 states and 506 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:40,527 INFO L93 Difference]: Finished difference Result 604 states and 767 transitions. [2024-11-09 04:56:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:40,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 258 [2024-11-09 04:56:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:40,531 INFO L225 Difference]: With dead ends: 604 [2024-11-09 04:56:40,531 INFO L226 Difference]: Without dead ends: 428 [2024-11-09 04:56:40,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:40,533 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 4 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:40,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 476 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:56:40,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-09 04:56:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2024-11-09 04:56:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 330 states have (on average 1.1636363636363636) internal successors, (384), 332 states have internal predecessors, (384), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-09 04:56:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 514 transitions. [2024-11-09 04:56:40,645 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 514 transitions. Word has length 258 [2024-11-09 04:56:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:40,645 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 514 transitions. [2024-11-09 04:56:40,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-09 04:56:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 514 transitions. [2024-11-09 04:56:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-09 04:56:40,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:40,648 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:56:40,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:40,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 04:56:40,849 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:40,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1315977965, now seen corresponding path program 1 times [2024-11-09 04:56:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012395102] [2024-11-09 04:56:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-09 04:56:41,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012395102] [2024-11-09 04:56:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012395102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:41,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114191589] [2024-11-09 04:56:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:41,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:41,038 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:41,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 04:56:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:41,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:41,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2024-11-09 04:56:41,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114191589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:41,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:56:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535388920] [2024-11-09 04:56:41,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:41,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:41,466 INFO L87 Difference]: Start difference. First operand 428 states and 514 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-09 04:56:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:41,702 INFO L93 Difference]: Finished difference Result 610 states and 765 transitions. [2024-11-09 04:56:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 266 [2024-11-09 04:56:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:41,706 INFO L225 Difference]: With dead ends: 610 [2024-11-09 04:56:41,707 INFO L226 Difference]: Without dead ends: 424 [2024-11-09 04:56:41,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:41,708 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 5 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:41,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 464 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:56:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-09 04:56:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 415. [2024-11-09 04:56:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 321 states have (on average 1.1433021806853583) internal successors, (367), 323 states have internal predecessors, (367), 62 states have call successors, (62), 31 states have call predecessors, (62), 31 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-09 04:56:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 491 transitions. [2024-11-09 04:56:41,826 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 491 transitions. Word has length 266 [2024-11-09 04:56:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:41,827 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 491 transitions. [2024-11-09 04:56:41,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-09 04:56:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 491 transitions. [2024-11-09 04:56:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-09 04:56:41,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:41,830 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 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, 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] [2024-11-09 04:56:41,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:42,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 04:56:42,031 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:42,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1171029842, now seen corresponding path program 1 times [2024-11-09 04:56:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355886999] [2024-11-09 04:56:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2024-11-09 04:56:42,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:42,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355886999] [2024-11-09 04:56:42,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355886999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:42,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152163927] [2024-11-09 04:56:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:42,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:42,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:42,257 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:42,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 04:56:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:42,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 04:56:42,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 32 proven. 163 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2024-11-09 04:56:43,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-09 04:56:43,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152163927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229878119] [2024-11-09 04:56:43,942 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2024-11-09 04:56:43,943 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:43,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:43,943 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:43,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:52,228 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-09 04:56:52,263 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:56:53,818 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 67 for LOIs [2024-11-09 04:56:53,849 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-09 04:56:53,999 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 42 for LOIs [2024-11-09 04:56:54,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:57:11,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1229878119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:57:11,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:57:11,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [5, 12, 13] total 83 [2024-11-09 04:57:11,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058779808] [2024-11-09 04:57:11,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:57:11,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 04:57:11,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:57:11,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 04:57:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=6348, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 04:57:11,860 INFO L87 Difference]: Start difference. First operand 415 states and 491 transitions. Second operand has 65 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 48 states have internal predecessors, (71), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-09 04:57:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:27,082 INFO L93 Difference]: Finished difference Result 756 states and 955 transitions. [2024-11-09 04:57:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-09 04:57:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 48 states have internal predecessors, (71), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) Word has length 269 [2024-11-09 04:57:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:27,087 INFO L225 Difference]: With dead ends: 756 [2024-11-09 04:57:27,088 INFO L226 Difference]: Without dead ends: 583 [2024-11-09 04:57:27,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 712 SyntacticMatches, 17 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4397 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=845, Invalid=12961, Unknown=0, NotChecked=0, Total=13806 [2024-11-09 04:57:27,091 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 161 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 5053 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 5118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 5053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:27,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1194 Invalid, 5118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 5053 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-11-09 04:57:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2024-11-09 04:57:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 564. [2024-11-09 04:57:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 427 states have (on average 1.1873536299765808) internal successors, (507), 432 states have internal predecessors, (507), 97 states have call successors, (97), 39 states have call predecessors, (97), 39 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-09 04:57:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 701 transitions. [2024-11-09 04:57:27,260 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 701 transitions. Word has length 269 [2024-11-09 04:57:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:27,261 INFO L471 AbstractCegarLoop]: Abstraction has 564 states and 701 transitions. [2024-11-09 04:57:27,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 48 states have internal predecessors, (71), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-09 04:57:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 701 transitions. [2024-11-09 04:57:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2024-11-09 04:57:27,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:27,264 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 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, 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] [2024-11-09 04:57:27,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 04:57:27,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 04:57:27,468 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:57:27,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1603957013, now seen corresponding path program 1 times [2024-11-09 04:57:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735919847] [2024-11-09 04:57:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2024-11-09 04:57:27,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:57:27,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735919847] [2024-11-09 04:57:27,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735919847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:57:27,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331334999] [2024-11-09 04:57:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:27,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:27,707 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:27,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 04:57:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:28,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 04:57:28,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 04:57:28,882 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:57:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331334999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:57:28,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:57:28,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5] total 18 [2024-11-09 04:57:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639456417] [2024-11-09 04:57:28,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:57:28,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:57:28,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:57:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:57:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:57:28,884 INFO L87 Difference]: Start difference. First operand 564 states and 701 transitions. Second operand has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 13 states have internal predecessors, (90), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 04:57:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:30,095 INFO L93 Difference]: Finished difference Result 1146 states and 1505 transitions. [2024-11-09 04:57:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 04:57:30,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 13 states have internal predecessors, (90), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 275 [2024-11-09 04:57:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:30,100 INFO L225 Difference]: With dead ends: 1146 [2024-11-09 04:57:30,100 INFO L226 Difference]: Without dead ends: 973 [2024-11-09 04:57:30,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-11-09 04:57:30,102 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 189 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:30,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2288 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:57:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2024-11-09 04:57:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 657. [2024-11-09 04:57:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 492 states have (on average 1.1910569105691058) internal successors, (586), 500 states have internal predecessors, (586), 117 states have call successors, (117), 48 states have call predecessors, (117), 47 states have return successors, (117), 108 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-09 04:57:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 820 transitions. [2024-11-09 04:57:30,282 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 820 transitions. Word has length 275 [2024-11-09 04:57:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:30,283 INFO L471 AbstractCegarLoop]: Abstraction has 657 states and 820 transitions. [2024-11-09 04:57:30,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 13 states have internal predecessors, (90), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 04:57:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 820 transitions. [2024-11-09 04:57:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2024-11-09 04:57:30,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:30,286 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 04:57:30,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 04:57:30,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 04:57:30,487 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:57:30,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash 112988621, now seen corresponding path program 1 times [2024-11-09 04:57:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:30,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628646543] [2024-11-09 04:57:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2024-11-09 04:57:30,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:57:30,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628646543] [2024-11-09 04:57:30,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628646543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:57:30,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078178337] [2024-11-09 04:57:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:30,749 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:30,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 04:57:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:31,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 04:57:31,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 251 proven. 143 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-11-09 04:57:32,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 49 proven. 192 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2024-11-09 04:57:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078178337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837639296] [2024-11-09 04:57:33,611 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2024-11-09 04:57:33,611 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:57:33,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:57:33,612 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:57:33,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:57:50,923 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 19 for LOIs [2024-11-09 04:57:50,963 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:57:52,331 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 102 for LOIs [2024-11-09 04:57:52,564 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 42 for LOIs [2024-11-09 04:57:52,651 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 61 for LOIs [2024-11-09 04:57:52,694 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:58:21,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71975#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_98| Int)) (and (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_98| 0) (<= 0 (+ ~votedValue_History_1~0 1)) (= |assert_#in~arg| 0) (= ~g2v~0 0) (<= ~nomsg~0 127) (<= 0 (+ ~votedValue_History_0~0 128)) (= ~nomsg~0 ~votedValue_History_0~0) (exists ((|v_ULTIMATE.start_check_#t~ret24#1_53| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_49| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret24#1_53| 0)) (<= 0 |v_ULTIMATE.start_check_#t~ret24#1_53|) (<= |v_ULTIMATE.start_check_#t~ret24#1_53| 1) (= |v_ULTIMATE.start_check_~tmp___7~0#1_49| 1))) (= ~g3v~0 0) (= ~g1v~0 0) (<= ~votedValue_History_1~0 127) (exists ((|v_ULTIMATE.start_check_#t~ret25#1_44| Int) (|v_ULTIMATE.start_check_~tmp___8~0#1_43| Int)) (and (= |v_ULTIMATE.start_check_~tmp___8~0#1_43| 0) (= |v_ULTIMATE.start_check_#t~ret25#1_44| 0))) (exists ((|v_ULTIMATE.start_check_#t~ret13#1_89| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_73| Int)) (and (= |v_ULTIMATE.start_check_~tmp___3~0#1_73| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_89|) (<= |v_ULTIMATE.start_check_#t~ret13#1_89| 1) (not (= |v_ULTIMATE.start_check_#t~ret13#1_89| 0))))))' at error location [2024-11-09 04:58:21,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:58:21,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:58:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 18, 20] total 40 [2024-11-09 04:58:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47209857] [2024-11-09 04:58:21,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:21,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 04:58:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:58:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 04:58:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=12786, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 04:58:21,166 INFO L87 Difference]: Start difference. First operand 657 states and 820 transitions. Second operand has 40 states, 39 states have (on average 5.9743589743589745) internal successors, (233), 35 states have internal predecessors, (233), 11 states have call successors, (51), 9 states have call predecessors, (51), 14 states have return successors, (52), 12 states have call predecessors, (52), 11 states have call successors, (52) [2024-11-09 04:58:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:25,719 INFO L93 Difference]: Finished difference Result 1225 states and 1539 transitions. [2024-11-09 04:58:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 04:58:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.9743589743589745) internal successors, (233), 35 states have internal predecessors, (233), 11 states have call successors, (51), 9 states have call predecessors, (51), 14 states have return successors, (52), 12 states have call predecessors, (52), 11 states have call successors, (52) Word has length 283 [2024-11-09 04:58:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:25,724 INFO L225 Difference]: With dead ends: 1225 [2024-11-09 04:58:25,724 INFO L226 Difference]: Without dead ends: 676 [2024-11-09 04:58:25,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 736 SyntacticMatches, 7 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7486 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=1026, Invalid=21026, Unknown=0, NotChecked=0, Total=22052 [2024-11-09 04:58:25,728 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 460 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:25,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 2124 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 04:58:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2024-11-09 04:58:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 661. [2024-11-09 04:58:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 495 states have (on average 1.1818181818181819) internal successors, (585), 503 states have internal predecessors, (585), 117 states have call successors, (117), 49 states have call predecessors, (117), 48 states have return successors, (117), 108 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-09 04:58:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 819 transitions. [2024-11-09 04:58:25,913 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 819 transitions. Word has length 283 [2024-11-09 04:58:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:25,913 INFO L471 AbstractCegarLoop]: Abstraction has 661 states and 819 transitions. [2024-11-09 04:58:25,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.9743589743589745) internal successors, (233), 35 states have internal predecessors, (233), 11 states have call successors, (51), 9 states have call predecessors, (51), 14 states have return successors, (52), 12 states have call predecessors, (52), 11 states have call successors, (52) [2024-11-09 04:58:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 819 transitions. [2024-11-09 04:58:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-09 04:58:25,917 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:25,918 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 9, 8, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:58:25,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 04:58:26,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:26,119 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:58:26,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1964641493, now seen corresponding path program 1 times [2024-11-09 04:58:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:58:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68377293] [2024-11-09 04:58:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:26,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:58:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 100 proven. 61 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2024-11-09 04:58:34,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68377293] [2024-11-09 04:58:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68377293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769455911] [2024-11-09 04:58:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:34,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:34,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:34,832 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:34,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 04:58:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:35,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-09 04:58:35,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 471 proven. 344 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-09 04:58:38,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 195 proven. 301 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-09 04:58:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769455911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85937851] [2024-11-09 04:58:42,819 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2024-11-09 04:58:42,819 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:58:42,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:58:42,820 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:58:42,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:59:01,063 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-09 04:59:01,094 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 04:59:03,433 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 150 for LOIs [2024-11-09 04:59:04,151 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 63 for LOIs [2024-11-09 04:59:04,281 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 25 for LOIs [2024-11-09 04:59:04,295 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:59:51,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76697#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_149| Int)) (and (= |assert_#in~arg| 0) (= ~g2v~0 0) (<= ~nomsg~0 127) (<= ~votedValue_History_2~0 127) (exists ((|v_ULTIMATE.start_check_~tmp___8~0#1_53| Int) (|v_ULTIMATE.start_check_#t~ret25#1_55| Int)) (and (= |v_ULTIMATE.start_check_#t~ret25#1_55| 0) (= |v_ULTIMATE.start_check_~tmp___8~0#1_53| 0))) (exists ((|v_ULTIMATE.start_check_~tmp___10~0#1_83| Int)) (and (or (and (exists ((|v_ULTIMATE.start_check_#t~ret14#1_60| Int) (|v_ULTIMATE.start_check_~tmp___4~0#1_55| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret14#1_60| 1) (not (= |v_ULTIMATE.start_check_#t~ret14#1_60| 0)) (= |v_ULTIMATE.start_check_~tmp___4~0#1_55| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret14#1_60|))) (= |v_ULTIMATE.start_check_~tmp___10~0#1_83| ~votedValue_History_1~0) (exists ((|v_ULTIMATE.start_check_#t~ret13#1_102| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_88| Int)) (and (= |v_ULTIMATE.start_check_~tmp___3~0#1_88| 0) (= |v_ULTIMATE.start_check_#t~ret13#1_102| 0)))) (and (exists ((|v_ULTIMATE.start_check_#t~ret13#1_102| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_89| Int)) (and (= |v_ULTIMATE.start_check_~tmp___3~0#1_89| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_102|) (not (= |v_ULTIMATE.start_check_#t~ret13#1_102| 0)) (<= |v_ULTIMATE.start_check_#t~ret13#1_102| 1))) (= |v_ULTIMATE.start_check_~tmp___10~0#1_83| ~votedValue_History_1~0))) (<= 0 (+ |v_ULTIMATE.start_check_~tmp___10~0#1_83| 1)))) (= ~nomsg~0 ~votedValue_History_0~0) (exists ((|v_ULTIMATE.start_check_#t~ret24#1_64| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_59| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret24#1_64| 1) (= |v_ULTIMATE.start_check_~tmp___7~0#1_59| 1) (not (= |v_ULTIMATE.start_check_#t~ret24#1_64| 0)) (<= 0 |v_ULTIMATE.start_check_#t~ret24#1_64|))) (= ~g3v~0 0) (= ~g1v~0 0) (<= 0 (+ ~nomsg~0 128)) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_149| 0) (<= ~votedValue_History_1~0 127) (<= 0 (+ ~votedValue_History_2~0 128))))' at error location [2024-11-09 04:59:51,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:59:51,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:59:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 24, 27] total 83 [2024-11-09 04:59:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456698358] [2024-11-09 04:59:51,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:59:51,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-09 04:59:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:59:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-09 04:59:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=24476, Unknown=0, NotChecked=0, Total=25440 [2024-11-09 04:59:51,910 INFO L87 Difference]: Start difference. First operand 661 states and 819 transitions. Second operand has 83 states, 82 states have (on average 4.439024390243903) internal successors, (364), 71 states have internal predecessors, (364), 24 states have call successors, (72), 11 states have call predecessors, (72), 27 states have return successors, (72), 32 states have call predecessors, (72), 24 states have call successors, (72) [2024-11-09 05:00:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:19,927 INFO L93 Difference]: Finished difference Result 1912 states and 2441 transitions. [2024-11-09 05:00:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-09 05:00:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.439024390243903) internal successors, (364), 71 states have internal predecessors, (364), 24 states have call successors, (72), 11 states have call predecessors, (72), 27 states have return successors, (72), 32 states have call predecessors, (72), 24 states have call successors, (72) Word has length 324 [2024-11-09 05:00:19,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:19,936 INFO L225 Difference]: With dead ends: 1912 [2024-11-09 05:00:19,936 INFO L226 Difference]: Without dead ends: 1476 [2024-11-09 05:00:19,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 850 SyntacticMatches, 18 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27495 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=4014, Invalid=80376, Unknown=0, NotChecked=0, Total=84390 [2024-11-09 05:00:19,945 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 1859 mSDsluCounter, 6457 mSDsCounter, 0 mSdLazyCounter, 14322 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 6619 SdHoareTripleChecker+Invalid, 15312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 14322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:19,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 6619 Invalid, 15312 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [990 Valid, 14322 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-11-09 05:00:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2024-11-09 05:00:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1029. [2024-11-09 05:00:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 760 states have (on average 1.1960526315789475) internal successors, (909), 777 states have internal predecessors, (909), 189 states have call successors, (189), 80 states have call predecessors, (189), 79 states have return successors, (189), 171 states have call predecessors, (189), 189 states have call successors, (189) [2024-11-09 05:00:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1287 transitions. [2024-11-09 05:00:20,325 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1287 transitions. Word has length 324 [2024-11-09 05:00:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:20,326 INFO L471 AbstractCegarLoop]: Abstraction has 1029 states and 1287 transitions. [2024-11-09 05:00:20,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.439024390243903) internal successors, (364), 71 states have internal predecessors, (364), 24 states have call successors, (72), 11 states have call predecessors, (72), 27 states have return successors, (72), 32 states have call predecessors, (72), 24 states have call successors, (72) [2024-11-09 05:00:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1287 transitions. [2024-11-09 05:00:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2024-11-09 05:00:20,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:20,330 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 12, 12, 12, 9, 9, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:20,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-09 05:00:20,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:20,532 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:20,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash -750941082, now seen corresponding path program 1 times [2024-11-09 05:00:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647424520] [2024-11-09 05:00:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 102 proven. 78 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-09 05:00:26,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647424520] [2024-11-09 05:00:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647424520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924059083] [2024-11-09 05:00:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:26,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:26,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:26,792 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3da56f-bc61-4fd8-9060-785d9e88479b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 05:00:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:27,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-09 05:00:27,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 320 proven. 126 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2024-11-09 05:00:35,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 109 proven. 90 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2024-11-09 05:00:42,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924059083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:42,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744918458] [2024-11-09 05:00:42,829 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2024-11-09 05:00:42,829 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:42,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:42,830 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:42,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:58,521 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 13 for LOIs [2024-11-09 05:00:58,556 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-09 05:01:00,555 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 149 for LOIs [2024-11-09 05:01:01,335 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 63 for LOIs [2024-11-09 05:01:01,437 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 61 for LOIs [2024-11-09 05:01:01,472 INFO L180 IcfgInterpreter]: Interpretation finished