./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:21:43,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:21:43,454 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:21:43,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:21:43,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:21:43,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:21:43,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:21:43,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:21:43,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:21:43,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:21:43,523 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:21:43,523 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:21:43,524 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:21:43,527 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:21:43,527 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:21:43,528 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:21:43,528 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:21:43,529 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:21:43,529 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:21:43,529 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:21:43,530 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:21:43,534 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:21:43,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:21:43,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:21:43,536 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:21:43,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:21:43,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:21:43,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:21:43,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:21:43,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:21:43,537 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:21:43,538 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:21:43,538 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:21:43,538 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:21:43,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:21:43,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:21:43,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:21:43,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:21:43,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:21:43,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:21:43,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:21:43,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:21:43,545 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:21:43,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:21:43,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:21:43,546 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:21:43,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:21:43,546 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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2024-11-09 05:21:43,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:21:43,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:21:43,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:21:43,962 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:21:43,962 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:21:43,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c Unable to find full path for "g++" [2024-11-09 05:21:46,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:21:46,469 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:21:46,469 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2024-11-09 05:21:46,479 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/data/9ea4c4047/cf88300a5adb4e75be901fee95511db1/FLAGa343b0f38 [2024-11-09 05:21:46,499 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/data/9ea4c4047/cf88300a5adb4e75be901fee95511db1 [2024-11-09 05:21:46,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:21:46,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:21:46,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:21:46,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:21:46,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:21:46,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:46,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8e1ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46, skipping insertion in model container [2024-11-09 05:21:46,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:46,580 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:21:46,874 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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2024-11-09 05:21:46,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:21:46,912 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:21:46,929 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_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2024-11-09 05:21:46,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:21:46,961 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:21:46,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46 WrapperNode [2024-11-09 05:21:46,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:21:46,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:21:46,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:21:46,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:21:46,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:46,982 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,004 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2024-11-09 05:21:47,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:21:47,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:21:47,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:21:47,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:21:47,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,038 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:21:47,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:21:47,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:21:47,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:21:47,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (1/1) ... [2024-11-09 05:21:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:21:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:47,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:21:47,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:21:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:21:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:21:47,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:21:47,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:21:47,255 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:21:47,272 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:21:47,444 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 05:21:47,444 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:21:47,493 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:21:47,494 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:21:47,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:21:47 BoogieIcfgContainer [2024-11-09 05:21:47,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:21:47,497 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:21:47,497 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:21:47,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:21:47,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:21:46" (1/3) ... [2024-11-09 05:21:47,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b02bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:21:47, skipping insertion in model container [2024-11-09 05:21:47,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:21:46" (2/3) ... [2024-11-09 05:21:47,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b02bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:21:47, skipping insertion in model container [2024-11-09 05:21:47,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:21:47" (3/3) ... [2024-11-09 05:21:47,506 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2024-11-09 05:21:47,528 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:21:47,528 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:21:47,605 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:21:47,613 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;@1e36e9ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:21:47,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:21:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:21:47,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:47,627 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:21:47,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:47,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2043421015, now seen corresponding path program 1 times [2024-11-09 05:21:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:47,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361290594] [2024-11-09 05:21:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:47,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:47,962 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 05:21:47,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:47,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361290594] [2024-11-09 05:21:47,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361290594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:21:47,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:21:47,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:21:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775251711] [2024-11-09 05:21:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:21:47,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:21:47,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:21:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:21:48,027 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:48,087 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2024-11-09 05:21:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:21:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:21:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:48,098 INFO L225 Difference]: With dead ends: 21 [2024-11-09 05:21:48,098 INFO L226 Difference]: Without dead ends: 11 [2024-11-09 05:21:48,100 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 05:21:48,105 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:48,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:21:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-09 05:21:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-09 05:21:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-09 05:21:48,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2024-11-09 05:21:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:48,143 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-09 05:21:48,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-09 05:21:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 05:21:48,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:48,145 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:48,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:21:48,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:48,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash 980237501, now seen corresponding path program 1 times [2024-11-09 05:21:48,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735148195] [2024-11-09 05:21:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:48,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:48,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735148195] [2024-11-09 05:21:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735148195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:48,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15318612] [2024-11-09 05:21:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:48,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:48,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:21:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:21:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:48,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:21:48,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:21:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:48,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15318612] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:48,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:21:48,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2024-11-09 05:21:48,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524504072] [2024-11-09 05:21:48,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:21:48,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:21:48,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:21:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:21:48,961 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:48,993 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-09 05:21:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:21:48,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 05:21:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:48,995 INFO L225 Difference]: With dead ends: 16 [2024-11-09 05:21:48,996 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 05:21:48,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:21:48,998 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:49,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:21:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 05:21:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 05:21:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 05:21:49,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2024-11-09 05:21:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:49,009 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 05:21:49,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 05:21:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:21:49,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:49,010 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:49,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:21:49,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:49,216 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:49,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:49,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1206149858, now seen corresponding path program 1 times [2024-11-09 05:21:49,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:49,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037420139] [2024-11-09 05:21:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:21:49,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037420139] [2024-11-09 05:21:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037420139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931473846] [2024-11-09 05:21:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:49,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:49,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:21:49,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:21:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:49,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:21:49,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:21:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:49,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:49,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931473846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:21:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826393625] [2024-11-09 05:21:49,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:21:49,776 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:21:49,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:21:49,789 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:21:49,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:21:50,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:21:51,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '208#(exists ((|v_ULTIMATE.start_main_~z~0#1_16| Int) (|v_ULTIMATE.start_main_~x~0#1_39| Int) (|v_ULTIMATE.start_main_~y~0#1_37| Int)) (and (<= |v_ULTIMATE.start_main_~y~0#1_37| |v_ULTIMATE.start_main_~z~0#1_16|) (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_16| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_39|)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_16| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_37|))) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_34| Int) (|v_ULTIMATE.start_main_~y~0#1_32| Int)) (and (= (+ 2 |v_ULTIMATE.start_main_~y~0#1_32|) |v_ULTIMATE.start_main_~y~0#1_37|) (<= |v_ULTIMATE.start_main_~x~0#1_34| 999999) (= |v_ULTIMATE.start_main_~x~0#1_39| (+ |v_ULTIMATE.start_main_~x~0#1_34| 2)))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_37| 1))) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_39| 2) 0))))' at error location [2024-11-09 05:21:51,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:21:51,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:21:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-09 05:21:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350494519] [2024-11-09 05:21:51,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:21:51,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:21:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:21:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:21:51,343 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 05:21:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:51,454 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2024-11-09 05:21:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:21:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 05:21:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:51,457 INFO L225 Difference]: With dead ends: 27 [2024-11-09 05:21:51,457 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 05:21:51,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:21:51,460 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:51,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:21:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 05:21:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 05:21:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 05:21:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-09 05:21:51,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2024-11-09 05:21:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:51,472 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-09 05:21:51,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 05:21:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-09 05:21:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 05:21:51,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:51,474 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:51,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:21:51,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:51,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:51,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 778775269, now seen corresponding path program 2 times [2024-11-09 05:21:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:51,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957212666] [2024-11-09 05:21:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:21:51,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957212666] [2024-11-09 05:21:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957212666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770779792] [2024-11-09 05:21:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:21:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:51,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:21:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:21:52,015 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:21:52,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:21:52,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:21:52,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:21:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:21:52,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:21:52,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770779792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:21:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742900378] [2024-11-09 05:21:52,163 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:21:52,163 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:21:52,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:21:52,164 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:21:52,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:21:52,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:21:53,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(exists ((|v_ULTIMATE.start_main_~x~0#1_56| Int) (|v_ULTIMATE.start_main_~z~0#1_17| Int) (|v_ULTIMATE.start_main_~y~0#1_54| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_17| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_54|)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_17| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_56|))) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_56| 2) 0)) (or (exists ((|v_ULTIMATE.start_main_~y~0#1_49| Int) (|v_ULTIMATE.start_main_~x~0#1_51| Int)) (and (= |v_ULTIMATE.start_main_~y~0#1_54| (+ 2 |v_ULTIMATE.start_main_~y~0#1_49|)) (<= |v_ULTIMATE.start_main_~x~0#1_51| 999999) (= |v_ULTIMATE.start_main_~x~0#1_56| (+ |v_ULTIMATE.start_main_~x~0#1_51| 2)))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_54| 1))) (<= |v_ULTIMATE.start_main_~y~0#1_54| |v_ULTIMATE.start_main_~z~0#1_17|)))' at error location [2024-11-09 05:21:53,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:21:53,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:21:53,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-09 05:21:53,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252170358] [2024-11-09 05:21:53,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:21:53,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:21:53,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:21:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:21:53,220 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 05:21:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:53,295 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-11-09 05:21:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:21:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-09 05:21:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:53,296 INFO L225 Difference]: With dead ends: 40 [2024-11-09 05:21:53,297 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 05:21:53,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:21:53,298 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:53,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:21:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 05:21:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 05:21:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 05:21:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-09 05:21:53,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2024-11-09 05:21:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:53,313 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-09 05:21:53,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 05:21:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-09 05:21:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 05:21:53,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:53,316 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:53,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:21:53,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:53,520 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:53,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash -292197067, now seen corresponding path program 3 times [2024-11-09 05:21:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249994424] [2024-11-09 05:21:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:21:53,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249994424] [2024-11-09 05:21:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249994424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741298514] [2024-11-09 05:21:53,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:21:53,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:53,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:21:53,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:21:54,000 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:21:54,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:21:54,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:21:54,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:21:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:54,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741298514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:21:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467811418] [2024-11-09 05:21:56,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:21:56,081 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:21:56,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:21:56,081 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:21:56,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:21:56,392 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:21:57,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '677#(exists ((|v_ULTIMATE.start_main_~z~0#1_19| Int) (|v_ULTIMATE.start_main_~x~0#1_81| Int) (|v_ULTIMATE.start_main_~y~0#1_84| Int)) (and (or (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_84| 1)) (exists ((|v_ULTIMATE.start_main_~y~0#1_79| Int) (|v_ULTIMATE.start_main_~x~0#1_76| Int)) (and (= |v_ULTIMATE.start_main_~x~0#1_81| (+ |v_ULTIMATE.start_main_~x~0#1_76| 2)) (= (+ 2 |v_ULTIMATE.start_main_~y~0#1_79|) |v_ULTIMATE.start_main_~y~0#1_84|) (<= |v_ULTIMATE.start_main_~x~0#1_76| 999999)))) (or (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_84|) (= |v_ULTIMATE.start_main_~z~0#1_19| 0)) (and (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_81|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_19| 0))) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_81| 2) 0)) (<= |v_ULTIMATE.start_main_~y~0#1_84| |v_ULTIMATE.start_main_~z~0#1_19|)))' at error location [2024-11-09 05:21:57,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:21:57,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:21:57,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2024-11-09 05:21:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674563709] [2024-11-09 05:21:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:21:57,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:21:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:21:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:21:57,086 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 05:21:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:57,251 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-09 05:21:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:21:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 26 [2024-11-09 05:21:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:57,255 INFO L225 Difference]: With dead ends: 55 [2024-11-09 05:21:57,255 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:21:57,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:21:57,257 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:57,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:21:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:21:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-09 05:21:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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 05:21:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-11-09 05:21:57,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2024-11-09 05:21:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:57,273 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-11-09 05:21:57,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 05:21:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-11-09 05:21:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 05:21:57,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:57,275 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:57,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:21:57,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:57,479 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:57,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1576750439, now seen corresponding path program 4 times [2024-11-09 05:21:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680664773] [2024-11-09 05:21:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:57,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 05:21:58,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:21:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680664773] [2024-11-09 05:21:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680664773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:21:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851227862] [2024-11-09 05:21:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:21:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:21:58,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:21:58,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:21:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:21:58,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:21:58,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:21:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 05:21:58,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851227862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:21:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896931716] [2024-11-09 05:21:59,057 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:21:59,058 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:21:59,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:21:59,058 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:21:59,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:21:59,335 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:21:59,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1097#(exists ((|v_ULTIMATE.start_main_~y~0#1_117| Int) (|v_ULTIMATE.start_main_~x~0#1_114| Int) (|v_ULTIMATE.start_main_~z~0#1_20| Int)) (and (or (exists ((|v_ULTIMATE.start_main_~x~0#1_109| Int) (|v_ULTIMATE.start_main_~y~0#1_112| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_109| 999999) (= |v_ULTIMATE.start_main_~y~0#1_117| (+ |v_ULTIMATE.start_main_~y~0#1_112| 2)) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_109|) |v_ULTIMATE.start_main_~x~0#1_114|))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_117| 1))) (<= |v_ULTIMATE.start_main_~y~0#1_117| |v_ULTIMATE.start_main_~z~0#1_20|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_114| 2) 0)) (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_20| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_114|)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_117|) (= |v_ULTIMATE.start_main_~z~0#1_20| 0)))))' at error location [2024-11-09 05:21:59,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:21:59,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:21:59,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 20] total 36 [2024-11-09 05:21:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187995909] [2024-11-09 05:21:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:21:59,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 05:21:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 05:21:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=1290, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:21:59,947 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:22:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:22:00,147 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2024-11-09 05:22:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 05:22:00,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-09 05:22:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:22:00,149 INFO L225 Difference]: With dead ends: 71 [2024-11-09 05:22:00,149 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:22:00,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=586, Invalid=1394, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:22:00,154 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:22:00,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:22:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:22:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-09 05:22:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 05:22:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-09 05:22:00,166 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2024-11-09 05:22:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:22:00,166 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-09 05:22:00,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:22:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-09 05:22:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 05:22:00,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:22:00,169 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-09 05:22:00,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:22:00,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:00,371 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:22:00,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:22:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1263545056, now seen corresponding path program 5 times [2024-11-09 05:22:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:22:00,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422463600] [2024-11-09 05:22:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:22:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:22:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-09 05:22:00,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:22:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422463600] [2024-11-09 05:22:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422463600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:22:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371478330] [2024-11-09 05:22:00,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:22:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:22:00,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:22:00,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:22:01,044 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 05:22:01,044 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:22:01,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:22:01,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:22:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-09 05:22:01,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:22:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-09 05:22:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371478330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:22:01,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544136545] [2024-11-09 05:22:01,434 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:22:01,434 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:22:01,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:22:01,435 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:22:01,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:22:01,717 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:22:02,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1555#(exists ((|v_ULTIMATE.start_main_~y~0#1_153| Int) (|v_ULTIMATE.start_main_~z~0#1_21| Int) (|v_ULTIMATE.start_main_~x~0#1_150| Int)) (and (or (and (<= 0 |v_ULTIMATE.start_main_~y~0#1_153|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_21| 0)) (and (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_150|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_21| 0))) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_145| Int) (|v_ULTIMATE.start_main_~y~0#1_148| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_145| 999999) (= |v_ULTIMATE.start_main_~y~0#1_153| (+ |v_ULTIMATE.start_main_~y~0#1_148| 2)) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_145|) |v_ULTIMATE.start_main_~x~0#1_150|))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_153| 1))) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_150| 2) 0)) (<= |v_ULTIMATE.start_main_~y~0#1_153| |v_ULTIMATE.start_main_~z~0#1_21|)))' at error location [2024-11-09 05:22:02,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:22:02,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:22:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-11-09 05:22:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617432318] [2024-11-09 05:22:02,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:22:02,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:22:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:22:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:22:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:22:02,216 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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 05:22:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:22:02,304 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2024-11-09 05:22:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:22:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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 44 [2024-11-09 05:22:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:22:02,306 INFO L225 Difference]: With dead ends: 92 [2024-11-09 05:22:02,306 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 05:22:02,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:22:02,307 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:22:02,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:22:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 05:22:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-09 05:22:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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 05:22:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-11-09 05:22:02,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 44 [2024-11-09 05:22:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:22:02,319 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-11-09 05:22:02,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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 05:22:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-11-09 05:22:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 05:22:02,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:22:02,323 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-09 05:22:02,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:22:02,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:02,524 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:22:02,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:22:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 541858536, now seen corresponding path program 6 times [2024-11-09 05:22:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:22:02,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269632025] [2024-11-09 05:22:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:22:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:22:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-09 05:22:04,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:22:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269632025] [2024-11-09 05:22:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269632025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:22:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10646913] [2024-11-09 05:22:04,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:22:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:22:04,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:22:04,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:22:04,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:22:04,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:22:04,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 05:22:04,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:22:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-09 05:22:04,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:22:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:22:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10646913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:22:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612526652] [2024-11-09 05:22:06,791 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:22:06,791 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:22:06,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:22:06,792 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:22:06,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:22:07,013 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:22:07,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2241#(exists ((|v_ULTIMATE.start_main_~y~0#1_209| Int) (|v_ULTIMATE.start_main_~x~0#1_206| Int) (|v_ULTIMATE.start_main_~z~0#1_22| Int)) (and (<= |v_ULTIMATE.start_main_~y~0#1_209| |v_ULTIMATE.start_main_~z~0#1_22|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_201| Int) (|v_ULTIMATE.start_main_~y~0#1_204| Int)) (and (= |v_ULTIMATE.start_main_~y~0#1_209| (+ |v_ULTIMATE.start_main_~y~0#1_204| 2)) (<= |v_ULTIMATE.start_main_~x~0#1_201| 999999) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_201|) |v_ULTIMATE.start_main_~x~0#1_206|))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_209| 1))) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_206| 2) 0)) (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_22| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_206|)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_22| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_209|)))))' at error location [2024-11-09 05:22:07,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:22:07,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:22:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 32] total 70 [2024-11-09 05:22:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672762064] [2024-11-09 05:22:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:22:07,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 05:22:07,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:22:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 05:22:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1913, Invalid=3939, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 05:22:07,855 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 05:22:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:22:08,242 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2024-11-09 05:22:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:22:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 64 [2024-11-09 05:22:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:22:08,247 INFO L225 Difference]: With dead ends: 97 [2024-11-09 05:22:08,247 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 05:22:08,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2051, Invalid=4111, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 05:22:08,249 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:22:08,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 47 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:22:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 05:22:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-09 05:22:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 05:22:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-11-09 05:22:08,260 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2024-11-09 05:22:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:22:08,261 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-11-09 05:22:08,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 05:22:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-11-09 05:22:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 05:22:08,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:22:08,263 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-09 05:22:08,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:22:08,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:08,464 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:22:08,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:22:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1683835489, now seen corresponding path program 7 times [2024-11-09 05:22:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:22:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642488553] [2024-11-09 05:22:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:22:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:22:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 05:22:09,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:22:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642488553] [2024-11-09 05:22:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642488553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:22:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231766878] [2024-11-09 05:22:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:22:09,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:10,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:22:10,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:22:10,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:22:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:10,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 05:22:10,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:22:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:22:11,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:22:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 361 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:22:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231766878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:22:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592609399] [2024-11-09 05:22:32,252 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:22:32,252 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:22:32,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:22:32,252 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:22:32,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:22:32,443 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:22:33,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2983#(exists ((|v_ULTIMATE.start_main_~y~0#1_281| Int) (|v_ULTIMATE.start_main_~x~0#1_265| Int) (|v_ULTIMATE.start_main_~z~0#1_24| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_265| 2) 0)) (or (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_281| 1)) (exists ((|v_ULTIMATE.start_main_~y~0#1_276| Int) (|v_ULTIMATE.start_main_~x~0#1_260| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_260| 999999) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_260|) |v_ULTIMATE.start_main_~x~0#1_265|) (= |v_ULTIMATE.start_main_~y~0#1_281| (+ |v_ULTIMATE.start_main_~y~0#1_276| 2))))) (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_24| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_281|)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_24| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_265|))) (<= |v_ULTIMATE.start_main_~y~0#1_281| |v_ULTIMATE.start_main_~z~0#1_24|)))' at error location [2024-11-09 05:22:33,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:22:33,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:22:33,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33, 33] total 85 [2024-11-09 05:22:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770863155] [2024-11-09 05:22:33,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:22:33,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 05:22:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:22:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 05:22:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2413, Invalid=5959, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 05:22:33,446 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 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 05:22:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:22:33,806 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2024-11-09 05:22:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:22:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 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 68 [2024-11-09 05:22:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:22:33,808 INFO L225 Difference]: With dead ends: 129 [2024-11-09 05:22:33,808 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 05:22:33,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2567, Invalid=6175, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 05:22:33,812 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:22:33,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:22:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 05:22:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-11-09 05:22:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:22:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2024-11-09 05:22:33,837 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 68 [2024-11-09 05:22:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:22:33,837 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2024-11-09 05:22:33,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 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 05:22:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2024-11-09 05:22:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 05:22:33,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:22:33,840 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 20, 20, 1, 1, 1, 1, 1, 1] [2024-11-09 05:22:33,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:22:34,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:34,043 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:22:34,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:22:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1277387195, now seen corresponding path program 8 times [2024-11-09 05:22:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:22:34,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042364247] [2024-11-09 05:22:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:22:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:22:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:22:35,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:22:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042364247] [2024-11-09 05:22:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042364247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:22:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904794958] [2024-11-09 05:22:35,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:22:35,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:22:35,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:22:35,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:22:35,926 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-09 05:22:35,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:22:35,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:22:35,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:22:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:22:36,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:22:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:22:37,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904794958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:22:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348113490] [2024-11-09 05:22:37,099 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:22:37,100 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:22:37,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:22:37,100 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:22:37,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:22:37,258 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:22:37,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3957#(exists ((|v_ULTIMATE.start_main_~z~0#1_25| Int) (|v_ULTIMATE.start_main_~y~0#1_356| Int) (|v_ULTIMATE.start_main_~x~0#1_340| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_340| 2) 0)) (<= |v_ULTIMATE.start_main_~y~0#1_356| |v_ULTIMATE.start_main_~z~0#1_25|) (or (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_356| 1)) (exists ((|v_ULTIMATE.start_main_~x~0#1_335| Int) (|v_ULTIMATE.start_main_~y~0#1_351| Int)) (and (= |v_ULTIMATE.start_main_~y~0#1_356| (+ |v_ULTIMATE.start_main_~y~0#1_351| 2)) (<= |v_ULTIMATE.start_main_~x~0#1_335| 999999) (= |v_ULTIMATE.start_main_~x~0#1_340| (+ 2 |v_ULTIMATE.start_main_~x~0#1_335|))))) (or (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_356|) (= |v_ULTIMATE.start_main_~z~0#1_25| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_25| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_340|)))))' at error location [2024-11-09 05:22:37,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:22:37,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:22:37,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2024-11-09 05:22:37,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993063828] [2024-11-09 05:22:37,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:22:37,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:22:37,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:22:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:22:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=1539, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:22:37,859 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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 05:22:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:22:38,033 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2024-11-09 05:22:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 05:22:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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 98 [2024-11-09 05:22:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:22:38,034 INFO L225 Difference]: With dead ends: 200 [2024-11-09 05:22:38,034 INFO L226 Difference]: Without dead ends: 143 [2024-11-09 05:22:38,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1011, Invalid=1539, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:22:38,036 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:22:38,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:22:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-09 05:22:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-09 05:22:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:22:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2024-11-09 05:22:38,061 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 98 [2024-11-09 05:22:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:22:38,062 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2024-11-09 05:22:38,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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 05:22:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2024-11-09 05:22:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 05:22:38,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:22:38,065 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 26, 26, 1, 1, 1, 1, 1, 1] [2024-11-09 05:22:38,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:22:38,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:22:38,266 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:22:38,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:22:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1876877197, now seen corresponding path program 9 times [2024-11-09 05:22:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:22:38,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355086633] [2024-11-09 05:22:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:22:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:22:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:22:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:22:43,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:22:43,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355086633] [2024-11-09 05:22:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355086633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:22:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641558369] [2024-11-09 05:22:43,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:22:43,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:22:43,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:22:43,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:22:43,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:22:44,105 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:22:44,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:22:44,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-09 05:22:44,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:22:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 2440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:22:47,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 1764 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641558369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111847915] [2024-11-09 05:27:56,060 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:27:56,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:56,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:56,061 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:56,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:56,240 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:57,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5502#(exists ((|v_ULTIMATE.start_main_~z~0#1_27| Int) (|v_ULTIMATE.start_main_~y~0#1_502| Int) (|v_ULTIMATE.start_main_~x~0#1_459| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_459| 2) 0)) (or (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_502|) (= |v_ULTIMATE.start_main_~z~0#1_27| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_27| 0) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_459|))) (<= |v_ULTIMATE.start_main_~y~0#1_502| |v_ULTIMATE.start_main_~z~0#1_27|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_454| Int) (|v_ULTIMATE.start_main_~y~0#1_497| Int)) (and (= (+ |v_ULTIMATE.start_main_~y~0#1_497| 2) |v_ULTIMATE.start_main_~y~0#1_502|) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_454|) |v_ULTIMATE.start_main_~x~0#1_459|) (<= |v_ULTIMATE.start_main_~x~0#1_454| 999999))) (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_502| 1)))))' at error location [2024-11-09 05:27:57,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:57,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:27:57,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 70, 70] total 182 [2024-11-09 05:27:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969342484] [2024-11-09 05:27:57,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:57,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2024-11-09 05:27:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2024-11-09 05:27:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10762, Invalid=24770, Unknown=0, NotChecked=0, Total=35532 [2024-11-09 05:27:57,912 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 183 states, 183 states have (on average 2.021857923497268) internal successors, (370), 182 states have internal predecessors, (370), 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 05:27:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:59,051 INFO L93 Difference]: Finished difference Result 259 states and 289 transitions. [2024-11-09 05:27:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-09 05:27:59,053 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 2.021857923497268) internal successors, (370), 182 states have internal predecessors, (370), 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 142 [2024-11-09 05:27:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:59,054 INFO L225 Difference]: With dead ends: 259 [2024-11-09 05:27:59,054 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 05:27:59,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14850 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=11087, Invalid=25203, Unknown=0, NotChecked=0, Total=36290 [2024-11-09 05:27:59,060 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:59,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:27:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 05:27:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2024-11-09 05:27:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 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 05:27:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2024-11-09 05:27:59,091 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 142 [2024-11-09 05:27:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:59,091 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2024-11-09 05:27:59,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 2.021857923497268) internal successors, (370), 182 states have internal predecessors, (370), 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 05:27:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2024-11-09 05:27:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-09 05:27:59,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:59,095 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 43, 43, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:59,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:27:59,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:27:59,296 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:59,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash 912642067, now seen corresponding path program 10 times [2024-11-09 05:27:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:59,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727757845] [2024-11-09 05:27:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2024-11-09 05:28:05,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:05,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727757845] [2024-11-09 05:28:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727757845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:05,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003153690] [2024-11-09 05:28:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:28:05,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:05,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:05,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:28:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:05,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 05:28:05,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 0 proven. 4765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:12,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 1849 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:39,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003153690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249465002] [2024-11-09 05:34:39,534 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:34:39,534 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:39,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:39,535 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:39,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:39,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:41,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7633#(exists ((|v_ULTIMATE.start_main_~y~0#1_706| Int) (|v_ULTIMATE.start_main_~z~0#1_29| Int) (|v_ULTIMATE.start_main_~x~0#1_608| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_608| 2) 0)) (or (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_29| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_706|)) (and (<= 1 |#StackHeapBarrier|) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_608|) (= |v_ULTIMATE.start_main_~z~0#1_29| 0))) (or (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_706| 1)) (exists ((|v_ULTIMATE.start_main_~y~0#1_701| Int) (|v_ULTIMATE.start_main_~x~0#1_603| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_603| 999999) (= |v_ULTIMATE.start_main_~x~0#1_608| (+ 2 |v_ULTIMATE.start_main_~x~0#1_603|)) (= |v_ULTIMATE.start_main_~y~0#1_706| (+ |v_ULTIMATE.start_main_~y~0#1_701| 2))))) (<= |v_ULTIMATE.start_main_~y~0#1_706| |v_ULTIMATE.start_main_~z~0#1_29|)))' at error location [2024-11-09 05:34:41,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:41,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:41,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 99, 99] total 241 [2024-11-09 05:34:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447222942] [2024-11-09 05:34:41,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:41,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2024-11-09 05:34:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2024-11-09 05:34:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19954, Invalid=41302, Unknown=0, NotChecked=0, Total=61256 [2024-11-09 05:34:41,264 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 242 states, 242 states have (on average 2.0165289256198347) internal successors, (488), 241 states have internal predecessors, (488), 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 05:34:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:44,397 INFO L93 Difference]: Finished difference Result 429 states and 487 transitions. [2024-11-09 05:34:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-11-09 05:34:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 2.0165289256198347) internal successors, (488), 241 states have internal predecessors, (488), 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 200 [2024-11-09 05:34:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:44,400 INFO L225 Difference]: With dead ends: 429 [2024-11-09 05:34:44,401 INFO L226 Difference]: Without dead ends: 316 [2024-11-09 05:34:44,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21827 ImplicationChecksByTransitivity, 76.6s TimeCoverageRelationStatistics Valid=20396, Invalid=41854, Unknown=0, NotChecked=0, Total=62250 [2024-11-09 05:34:44,405 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:44,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:34:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-09 05:34:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2024-11-09 05:34:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0063694267515924) internal successors, (316), 314 states have internal predecessors, (316), 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 05:34:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2024-11-09 05:34:44,479 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 200 [2024-11-09 05:34:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:44,479 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2024-11-09 05:34:44,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 2.0165289256198347) internal successors, (488), 241 states have internal predecessors, (488), 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 05:34:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2024-11-09 05:34:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-09 05:34:44,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:44,485 INFO L215 NwaCegarLoop]: trace histogram [110, 110, 44, 44, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:44,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:34:44,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:44,686 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:44,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2072178625, now seen corresponding path program 11 times [2024-11-09 05:34:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:44,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058170178] [2024-11-09 05:34:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14036 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 12100 trivial. 0 not checked. [2024-11-09 05:34:51,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:51,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058170178] [2024-11-09 05:34:51,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058170178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:51,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205008703] [2024-11-09 05:34:51,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:34:51,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:51,858 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:51,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:34:52,131 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2024-11-09 05:34:52,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:34:52,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 05:34:52,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14036 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 12100 trivial. 0 not checked. [2024-11-09 05:34:52,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14036 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 12100 trivial. 0 not checked. [2024-11-09 05:34:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205008703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302599487] [2024-11-09 05:34:55,901 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:34:55,901 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:55,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:55,902 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:55,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:56,036 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:56,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10725#(exists ((|v_ULTIMATE.start_main_~y~0#1_913| Int) (|v_ULTIMATE.start_main_~z~0#1_30| Int) (|v_ULTIMATE.start_main_~x~0#1_815| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 1000000 |v_ULTIMATE.start_main_~x~0#1_815|) (= |v_ULTIMATE.start_main_~z~0#1_30| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~z~0#1_30| 0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_913|))) (<= |v_ULTIMATE.start_main_~y~0#1_913| |v_ULTIMATE.start_main_~z~0#1_30|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_815| 2) 0)) (or (< 0 (+ |v_ULTIMATE.start_main_~y~0#1_913| 1)) (exists ((|v_ULTIMATE.start_main_~x~0#1_810| Int) (|v_ULTIMATE.start_main_~y~0#1_908| Int)) (and (= |v_ULTIMATE.start_main_~y~0#1_913| (+ |v_ULTIMATE.start_main_~y~0#1_908| 2)) (<= |v_ULTIMATE.start_main_~x~0#1_810| 999999) (= (+ 2 |v_ULTIMATE.start_main_~x~0#1_810|) |v_ULTIMATE.start_main_~x~0#1_815|))))))' at error location [2024-11-09 05:34:56,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:56,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2024-11-09 05:34:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647357959] [2024-11-09 05:34:56,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:56,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-09 05:34:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-09 05:34:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4299, Invalid=5403, Unknown=0, NotChecked=0, Total=9702 [2024-11-09 05:34:56,803 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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 05:34:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:57,226 INFO L93 Difference]: Finished difference Result 632 states and 679 transitions. [2024-11-09 05:34:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-09 05:34:57,226 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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 314 [2024-11-09 05:34:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:57,228 INFO L225 Difference]: With dead ends: 632 [2024-11-09 05:34:57,228 INFO L226 Difference]: Without dead ends: 407 [2024-11-09 05:34:57,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 888 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4299, Invalid=5403, Unknown=0, NotChecked=0, Total=9702 [2024-11-09 05:34:57,231 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:57,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:34:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-09 05:34:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2024-11-09 05:34:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.0049261083743843) internal successors, (408), 406 states have internal predecessors, (408), 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 05:34:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 408 transitions. [2024-11-09 05:34:57,284 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 408 transitions. Word has length 314 [2024-11-09 05:34:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:57,285 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 408 transitions. [2024-11-09 05:34:57,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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 05:34:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 408 transitions. [2024-11-09 05:34:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-11-09 05:34:57,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:57,294 INFO L215 NwaCegarLoop]: trace histogram [110, 110, 90, 90, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:57,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:34:57,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:57,495 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:57,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 785781975, now seen corresponding path program 12 times [2024-11-09 05:34:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090616846] [2024-11-09 05:34:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:35:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 12100 trivial. 0 not checked. [2024-11-09 05:35:22,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:35:22,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090616846] [2024-11-09 05:35:22,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090616846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:35:22,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634909242] [2024-11-09 05:35:22,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:35:22,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:35:22,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:35:22,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:35:22,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4b6f81-4365-46a6-bd3e-1281f7c87e9a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:35:23,671 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:35:23,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:35:23,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-11-09 05:35:23,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:35:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 20200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:35:48,025 INFO L311 TraceCheckSpWp]: Computing backward predicates...