./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/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 87c0d05d6e0355591807918f29d7510d5603d16064875313848d28b6b97f865e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:48:18,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:48:18,388 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:48:18,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:48:18,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:48:18,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:48:18,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:48:18,445 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:48:18,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:48:18,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:48:18,448 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:48:18,448 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:48:18,448 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:48:18,449 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:48:18,449 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:48:18,449 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:48:18,449 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:48:18,450 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:48:18,450 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:48:18,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:48:18,451 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:48:18,455 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:48:18,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:48:18,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:48:18,456 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:48:18,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:48:18,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:48:18,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:48:18,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:48:18,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:48:18,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:48:18,458 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:48:18,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:48:18,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:48:18,459 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:48:18,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:48:18,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:48:18,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:48:18,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:48:18,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:48:18,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:48:18,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:48:18,466 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:48:18,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:48:18,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:48:18,466 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:48:18,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:48:18,467 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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87c0d05d6e0355591807918f29d7510d5603d16064875313848d28b6b97f865e [2024-11-09 04:48:18,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:48:18,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:48:18,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:48:18,816 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:48:18,816 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:48:18,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-09 04:48:20,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:48:21,056 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:48:21,057 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2024-11-09 04:48:21,069 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/data/95e66411c/4433b8b440ea4657a7f78acb4cdd1f5b/FLAGe51fea479 [2024-11-09 04:48:21,084 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/data/95e66411c/4433b8b440ea4657a7f78acb4cdd1f5b [2024-11-09 04:48:21,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:48:21,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:48:21,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:48:21,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:48:21,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:48:21,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,100 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7649de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21, skipping insertion in model container [2024-11-09 04:48:21,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,153 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:48:21,386 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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5337,5350] [2024-11-09 04:48:21,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:48:21,457 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:48:21,501 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_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5337,5350] [2024-11-09 04:48:21,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:48:21,547 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:48:21,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21 WrapperNode [2024-11-09 04:48:21,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:48:21,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:48:21,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:48:21,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:48:21,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,603 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 470 [2024-11-09 04:48:21,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:48:21,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:48:21,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:48:21,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:48:21,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:48:21,646 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:48:21,646 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:48:21,646 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:48:21,647 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (1/1) ... [2024-11-09 04:48:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:48:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:21,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:48:21,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:48:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:48:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:48:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:48:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:48:21,893 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:48:21,896 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:48:22,480 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-09 04:48:22,481 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:48:22,614 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:48:22,614 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:48:22,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:48:22 BoogieIcfgContainer [2024-11-09 04:48:22,615 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:48:22,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:48:22,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:48:22,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:48:22,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:48:21" (1/3) ... [2024-11-09 04:48:22,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8813e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:48:22, skipping insertion in model container [2024-11-09 04:48:22,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:21" (2/3) ... [2024-11-09 04:48:22,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8813e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:48:22, skipping insertion in model container [2024-11-09 04:48:22,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:48:22" (3/3) ... [2024-11-09 04:48:22,626 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2024-11-09 04:48:22,646 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:48:22,647 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:48:22,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:48:22,726 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;@5bfba6e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:48:22,726 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:48:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 83 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 04:48:22,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:22,741 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:22,742 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:22,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 848635518, now seen corresponding path program 1 times [2024-11-09 04:48:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476281541] [2024-11-09 04:48:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:23,288 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 04:48:23,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476281541] [2024-11-09 04:48:23,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476281541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:23,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:23,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:48:23,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31738506] [2024-11-09 04:48:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:23,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:48:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:48:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:48:23,325 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 83 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:23,402 INFO L93 Difference]: Finished difference Result 189 states and 295 transitions. [2024-11-09 04:48:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:48:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-09 04:48:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:23,414 INFO L225 Difference]: With dead ends: 189 [2024-11-09 04:48:23,414 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 04:48:23,417 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 04:48:23,421 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 102 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:23,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 261 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:48:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 04:48:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-09 04:48:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2024-11-09 04:48:23,464 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2024-11-09 04:48:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:23,465 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2024-11-09 04:48:23,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2024-11-09 04:48:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:48:23,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:23,467 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:23,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:48:23,468 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:23,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1556664107, now seen corresponding path program 1 times [2024-11-09 04:48:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:23,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919676747] [2024-11-09 04:48:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:23,689 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 04:48:23,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919676747] [2024-11-09 04:48:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919676747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:23,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:23,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:48:23,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544994528] [2024-11-09 04:48:23,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:23,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:48:23,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:48:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:48:23,694 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:23,771 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2024-11-09 04:48:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:48:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-09 04:48:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:23,774 INFO L225 Difference]: With dead ends: 301 [2024-11-09 04:48:23,774 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 04:48:23,775 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 04:48:23,779 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:23,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 04:48:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2024-11-09 04:48:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2024-11-09 04:48:23,796 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2024-11-09 04:48:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:23,797 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2024-11-09 04:48:23,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2024-11-09 04:48:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:48:23,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:23,799 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:23,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:48:23,799 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:23,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1013819675, now seen corresponding path program 1 times [2024-11-09 04:48:23,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:23,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643656641] [2024-11-09 04:48:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:23,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:23,952 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 04:48:23,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:23,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643656641] [2024-11-09 04:48:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643656641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:23,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:48:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798903677] [2024-11-09 04:48:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:23,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:48:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:48:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:48:23,959 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:24,028 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2024-11-09 04:48:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:48:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 04:48:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:24,034 INFO L225 Difference]: With dead ends: 504 [2024-11-09 04:48:24,038 INFO L226 Difference]: Without dead ends: 330 [2024-11-09 04:48:24,039 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 04:48:24,042 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:24,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-09 04:48:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2024-11-09 04:48:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2024-11-09 04:48:24,085 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2024-11-09 04:48:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:24,086 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2024-11-09 04:48:24,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2024-11-09 04:48:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:48:24,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:24,092 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:24,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:48:24,092 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:24,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1011258039, now seen corresponding path program 1 times [2024-11-09 04:48:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:24,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784702769] [2024-11-09 04:48:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:24,224 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 04:48:24,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784702769] [2024-11-09 04:48:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784702769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:24,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:48:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364024437] [2024-11-09 04:48:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:24,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:48:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:48:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:48:24,230 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:24,294 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2024-11-09 04:48:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:48:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-09 04:48:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:24,296 INFO L225 Difference]: With dead ends: 844 [2024-11-09 04:48:24,297 INFO L226 Difference]: Without dead ends: 542 [2024-11-09 04:48:24,298 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 04:48:24,303 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:24,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2024-11-09 04:48:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2024-11-09 04:48:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2024-11-09 04:48:24,370 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2024-11-09 04:48:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:24,371 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2024-11-09 04:48:24,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2024-11-09 04:48:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 04:48:24,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:24,372 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:24,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:48:24,373 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:24,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1019017540, now seen corresponding path program 1 times [2024-11-09 04:48:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:24,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075690522] [2024-11-09 04:48:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:24,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:24,645 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 04:48:24,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:24,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075690522] [2024-11-09 04:48:24,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075690522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:24,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:24,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:48:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71897611] [2024-11-09 04:48:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:24,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:48:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:48:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:48:24,652 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:24,781 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2024-11-09 04:48:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:48:24,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-09 04:48:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:24,789 INFO L225 Difference]: With dead ends: 2244 [2024-11-09 04:48:24,790 INFO L226 Difference]: Without dead ends: 1730 [2024-11-09 04:48:24,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:48:24,793 INFO L432 NwaCegarLoop]: 178 mSDtfsCounter, 300 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:24,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 465 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2024-11-09 04:48:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2024-11-09 04:48:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2024-11-09 04:48:24,844 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2024-11-09 04:48:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:24,846 INFO L471 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2024-11-09 04:48:24,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2024-11-09 04:48:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:48:24,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:24,853 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:24,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:48:24,853 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:24,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2055672603, now seen corresponding path program 1 times [2024-11-09 04:48:24,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:24,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530779895] [2024-11-09 04:48:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:24,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:25,023 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 04:48:25,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530779895] [2024-11-09 04:48:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530779895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:25,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:25,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:48:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419502022] [2024-11-09 04:48:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:25,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:48:25,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:48:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:48:25,028 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:25,235 INFO L93 Difference]: Finished difference Result 4430 states and 6427 transitions. [2024-11-09 04:48:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:48:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-09 04:48:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:25,246 INFO L225 Difference]: With dead ends: 4430 [2024-11-09 04:48:25,246 INFO L226 Difference]: Without dead ends: 2732 [2024-11-09 04:48:25,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:48:25,250 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 448 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:25,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 108 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2024-11-09 04:48:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2730. [2024-11-09 04:48:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 1.4338585562477097) internal successors, (3913), 2729 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3913 transitions. [2024-11-09 04:48:25,339 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3913 transitions. Word has length 51 [2024-11-09 04:48:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:25,340 INFO L471 AbstractCegarLoop]: Abstraction has 2730 states and 3913 transitions. [2024-11-09 04:48:25,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3913 transitions. [2024-11-09 04:48:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:48:25,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:25,342 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:25,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:48:25,343 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:25,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1273415370, now seen corresponding path program 1 times [2024-11-09 04:48:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013786452] [2024-11-09 04:48:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:25,918 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 04:48:25,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013786452] [2024-11-09 04:48:25,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013786452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:25,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:25,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:48:25,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991535161] [2024-11-09 04:48:25,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:25,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:48:25,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:25,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:48:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:48:25,921 INFO L87 Difference]: Start difference. First operand 2730 states and 3913 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:26,167 INFO L93 Difference]: Finished difference Result 4666 states and 6697 transitions. [2024-11-09 04:48:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:48:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-09 04:48:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:26,184 INFO L225 Difference]: With dead ends: 4666 [2024-11-09 04:48:26,184 INFO L226 Difference]: Without dead ends: 4664 [2024-11-09 04:48:26,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-11-09 04:48:26,189 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 706 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:26,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 880 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:48:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4664 states. [2024-11-09 04:48:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4664 to 2977. [2024-11-09 04:48:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 1.4341397849462365) internal successors, (4268), 2976 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 4268 transitions. [2024-11-09 04:48:26,276 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 4268 transitions. Word has length 51 [2024-11-09 04:48:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:26,278 INFO L471 AbstractCegarLoop]: Abstraction has 2977 states and 4268 transitions. [2024-11-09 04:48:26,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 4268 transitions. [2024-11-09 04:48:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 04:48:26,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:26,280 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:26,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:48:26,280 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:26,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 704494427, now seen corresponding path program 1 times [2024-11-09 04:48:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804081942] [2024-11-09 04:48:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:26,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:27,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804081942] [2024-11-09 04:48:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804081942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235650418] [2024-11-09 04:48:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:27,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:27,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:48:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:28,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 04:48:28,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:30,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235650418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911072714] [2024-11-09 04:48:43,272 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2024-11-09 04:48:43,272 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:43,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:43,284 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:43,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:54,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:14,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22348#(and (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_19| Int)) (and (<= |v_ULTIMATE.start_main_~assert__arg~0#1_19| 1) (= (mod |v_ULTIMATE.start_main_~assert__arg~0#1_19| 256) 0))) (<= ~mode3~0 1) (<= ~mode4~0 1) (<= ~__return_19424~0 1))' at error location [2024-11-09 04:49:14,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:49:14,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:49:14,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 51 [2024-11-09 04:49:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50591125] [2024-11-09 04:49:14,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:49:14,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 04:49:14,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 04:49:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=8158, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 04:49:14,385 INFO L87 Difference]: Start difference. First operand 2977 states and 4268 transitions. Second operand has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:22,934 INFO L93 Difference]: Finished difference Result 38061 states and 54706 transitions. [2024-11-09 04:51:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-11-09 04:51:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-09 04:51:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:23,017 INFO L225 Difference]: With dead ends: 38061 [2024-11-09 04:51:23,017 INFO L226 Difference]: Without dead ends: 35138 [2024-11-09 04:51:23,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85383 ImplicationChecksByTransitivity, 135.6s TimeCoverageRelationStatistics Valid=27945, Invalid=153957, Unknown=0, NotChecked=0, Total=181902 [2024-11-09 04:51:23,046 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 14380 mSDsluCounter, 5657 mSDsCounter, 0 mSdLazyCounter, 8311 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14380 SdHoareTripleChecker+Valid, 5806 SdHoareTripleChecker+Invalid, 9076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 8311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:23,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14380 Valid, 5806 Invalid, 9076 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [765 Valid, 8311 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2024-11-09 04:51:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35138 states. [2024-11-09 04:51:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35138 to 16673. [2024-11-09 04:51:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16673 states, 16672 states have (on average 1.4004318618042226) internal successors, (23348), 16672 states have internal predecessors, (23348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16673 states to 16673 states and 23348 transitions. [2024-11-09 04:51:23,549 INFO L78 Accepts]: Start accepts. Automaton has 16673 states and 23348 transitions. Word has length 61 [2024-11-09 04:51:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:23,550 INFO L471 AbstractCegarLoop]: Abstraction has 16673 states and 23348 transitions. [2024-11-09 04:51:23,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16673 states and 23348 transitions. [2024-11-09 04:51:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 04:51:23,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:23,555 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:23,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:51:23,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:23,759 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:23,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -651525596, now seen corresponding path program 1 times [2024-11-09 04:51:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666756612] [2024-11-09 04:51:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:51:23,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:23,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666756612] [2024-11-09 04:51:23,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666756612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:23,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:51:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75039447] [2024-11-09 04:51:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:23,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:51:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:51:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:23,931 INFO L87 Difference]: Start difference. First operand 16673 states and 23348 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:24,197 INFO L93 Difference]: Finished difference Result 41962 states and 59153 transitions. [2024-11-09 04:51:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:51:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-09 04:51:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:24,250 INFO L225 Difference]: With dead ends: 41962 [2024-11-09 04:51:24,250 INFO L226 Difference]: Without dead ends: 25358 [2024-11-09 04:51:24,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:51:24,272 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 429 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:24,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 118 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2024-11-09 04:51:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 25356. [2024-11-09 04:51:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25356 states, 25355 states have (on average 1.3983435219877736) internal successors, (35455), 25355 states have internal predecessors, (35455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25356 states to 25356 states and 35455 transitions. [2024-11-09 04:51:24,720 INFO L78 Accepts]: Start accepts. Automaton has 25356 states and 35455 transitions. Word has length 61 [2024-11-09 04:51:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:24,721 INFO L471 AbstractCegarLoop]: Abstraction has 25356 states and 35455 transitions. [2024-11-09 04:51:24,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25356 states and 35455 transitions. [2024-11-09 04:51:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 04:51:24,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:24,724 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:24,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:51:24,725 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:24,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -515764385, now seen corresponding path program 1 times [2024-11-09 04:51:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167215109] [2024-11-09 04:51:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:26,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167215109] [2024-11-09 04:51:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167215109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823636131] [2024-11-09 04:51:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:26,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:26,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:26,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:51:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:26,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 04:51:26,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:28,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:39,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823636131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:39,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013241767] [2024-11-09 04:51:39,242 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2024-11-09 04:51:39,243 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:39,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:39,243 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:39,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:45,576 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:04,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '145526#(and (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_27| Int)) (and (= (mod |v_ULTIMATE.start_main_~assert__arg~0#1_27| 256) 0) (<= |v_ULTIMATE.start_main_~assert__arg~0#1_27| 1))) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= ~mode4~0 1) (<= ~__return_19424~0 1))' at error location [2024-11-09 04:52:04,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:04,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:04,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 51 [2024-11-09 04:52:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566535249] [2024-11-09 04:52:04,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:04,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 04:52:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 04:52:04,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=8142, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 04:52:04,897 INFO L87 Difference]: Start difference. First operand 25356 states and 35455 transitions. Second operand has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:56,609 INFO L93 Difference]: Finished difference Result 109057 states and 153219 transitions. [2024-11-09 04:53:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2024-11-09 04:53:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-09 04:53:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:56,779 INFO L225 Difference]: With dead ends: 109057 [2024-11-09 04:53:56,779 INFO L226 Difference]: Without dead ends: 83735 [2024-11-09 04:53:56,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56358 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=16451, Invalid=106399, Unknown=0, NotChecked=0, Total=122850 [2024-11-09 04:53:56,828 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 9353 mSDsluCounter, 6042 mSDsCounter, 0 mSdLazyCounter, 8952 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9353 SdHoareTripleChecker+Valid, 6213 SdHoareTripleChecker+Invalid, 9554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 8952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:56,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9353 Valid, 6213 Invalid, 9554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [602 Valid, 8952 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2024-11-09 04:53:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83735 states. [2024-11-09 04:53:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83735 to 35231. [2024-11-09 04:53:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35231 states, 35230 states have (on average 1.3987794493329548) internal successors, (49279), 35230 states have internal predecessors, (49279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35231 states to 35231 states and 49279 transitions. [2024-11-09 04:53:57,658 INFO L78 Accepts]: Start accepts. Automaton has 35231 states and 49279 transitions. Word has length 61 [2024-11-09 04:53:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:57,659 INFO L471 AbstractCegarLoop]: Abstraction has 35231 states and 49279 transitions. [2024-11-09 04:53:57,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 35231 states and 49279 transitions. [2024-11-09 04:53:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 04:53:57,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:57,662 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:53:57,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:53:57,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:53:57,863 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:53:57,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash -249153107, now seen corresponding path program 1 times [2024-11-09 04:53:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60968120] [2024-11-09 04:53:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:53:59,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:59,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60968120] [2024-11-09 04:53:59,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60968120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:59,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319969564] [2024-11-09 04:53:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:59,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:59,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:53:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:59,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 04:53:59,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:54:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:54:01,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:54:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:54:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319969564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:54:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713944534] [2024-11-09 04:54:11,334 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 04:54:11,335 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:54:11,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:54:11,335 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:54:11,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:54:15,127 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:54:33,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '290794#(and (<= 0 ~__return_19424~0) (<= ~__return_19424~0 1) (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_34| Int)) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_34|)))' at error location [2024-11-09 04:54:33,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:54:33,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:54:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 54 [2024-11-09 04:54:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880370060] [2024-11-09 04:54:33,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:54:33,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 04:54:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:54:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 04:54:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=8561, Unknown=0, NotChecked=0, Total=9900 [2024-11-09 04:54:33,958 INFO L87 Difference]: Start difference. First operand 35231 states and 49279 transitions. Second operand has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:59:37,154 INFO L93 Difference]: Finished difference Result 169145 states and 236390 transitions. [2024-11-09 04:59:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 657 states. [2024-11-09 04:59:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-09 04:59:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:59:37,457 INFO L225 Difference]: With dead ends: 169145 [2024-11-09 04:59:37,457 INFO L226 Difference]: Without dead ends: 135425 [2024-11-09 04:59:37,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 744 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276311 ImplicationChecksByTransitivity, 301.3s TimeCoverageRelationStatistics Valid=65708, Invalid=490062, Unknown=0, NotChecked=0, Total=555770 [2024-11-09 04:59:37,537 INFO L432 NwaCegarLoop]: 368 mSDtfsCounter, 14382 mSDsluCounter, 7241 mSDsCounter, 0 mSdLazyCounter, 12808 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14382 SdHoareTripleChecker+Valid, 7609 SdHoareTripleChecker+Invalid, 13922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 12808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:59:37,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14382 Valid, 7609 Invalid, 13922 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1114 Valid, 12808 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2024-11-09 04:59:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135425 states. [2024-11-09 04:59:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135425 to 63610. [2024-11-09 04:59:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63610 states, 63609 states have (on average 1.3876181043563018) internal successors, (88265), 63609 states have internal predecessors, (88265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63610 states to 63610 states and 88265 transitions. [2024-11-09 04:59:38,735 INFO L78 Accepts]: Start accepts. Automaton has 63610 states and 88265 transitions. Word has length 63 [2024-11-09 04:59:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:59:38,735 INFO L471 AbstractCegarLoop]: Abstraction has 63610 states and 88265 transitions. [2024-11-09 04:59:38,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 63610 states and 88265 transitions. [2024-11-09 04:59:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 04:59:38,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:59:38,739 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:59:38,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:59:38,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:59:38,940 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:59:38,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:59:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2021363854, now seen corresponding path program 1 times [2024-11-09 04:59:38,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:59:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602409362] [2024-11-09 04:59:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:59:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:59:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:59:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:59:39,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:59:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602409362] [2024-11-09 04:59:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602409362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:59:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:59:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:59:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033883898] [2024-11-09 04:59:39,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:59:39,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:59:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:59:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:59:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:59:39,058 INFO L87 Difference]: Start difference. First operand 63610 states and 88265 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:59:39,575 INFO L93 Difference]: Finished difference Result 153427 states and 213971 transitions. [2024-11-09 04:59:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:59:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-09 04:59:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:59:39,700 INFO L225 Difference]: With dead ends: 153427 [2024-11-09 04:59:39,700 INFO L226 Difference]: Without dead ends: 90714 [2024-11-09 04:59:39,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:59:39,747 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 393 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:59:39,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 136 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:59:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90714 states. [2024-11-09 04:59:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90714 to 90622. [2024-11-09 04:59:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90622 states, 90621 states have (on average 1.390108253053928) internal successors, (125973), 90621 states have internal predecessors, (125973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90622 states to 90622 states and 125973 transitions. [2024-11-09 04:59:41,803 INFO L78 Accepts]: Start accepts. Automaton has 90622 states and 125973 transitions. Word has length 63 [2024-11-09 04:59:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:59:41,803 INFO L471 AbstractCegarLoop]: Abstraction has 90622 states and 125973 transitions. [2024-11-09 04:59:41,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 90622 states and 125973 transitions. [2024-11-09 04:59:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 04:59:41,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:59:41,807 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:59:41,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 04:59:41,807 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:59:41,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:59:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1649752685, now seen corresponding path program 1 times [2024-11-09 04:59:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:59:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103500689] [2024-11-09 04:59:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:59:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:59:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:59:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:59:43,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:59:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103500689] [2024-11-09 04:59:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103500689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:59:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435845218] [2024-11-09 04:59:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:59:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:59:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:59:43,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:59:43,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_447a3e88-f4b4-44fb-bb51-a5e373ea9d14/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:59:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:59:43,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 04:59:43,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:59:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:59:46,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:59:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:59:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435845218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:59:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425816466] [2024-11-09 04:59:57,376 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 04:59:57,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:59:57,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:59:57,376 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:59:57,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:09,058 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:30,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769369#(and (<= ~mode3~0 1) (<= 0 ~__return_19424~0) (<= ~mode4~0 1) (<= ~__return_19424~0 1) (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_49| Int)) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_49|)))' at error location [2024-11-09 05:00:30,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:30,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:30,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 52 [2024-11-09 05:00:30,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204830382] [2024-11-09 05:00:30,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:30,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 05:00:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 05:00:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1244, Invalid=8856, Unknown=0, NotChecked=0, Total=10100 [2024-11-09 05:00:30,039 INFO L87 Difference]: Start difference. First operand 90622 states and 125973 transitions. Second operand has 52 states, 52 states have (on average 3.576923076923077) internal successors, (186), 52 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)