./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ --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 8428b1c54d08b0acf44cd2a1c42dab6a84cc81171283bdc7e98bc732fc15484a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:58,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:58,413 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:58,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:58,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:58,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:58,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:58,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:58,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:58,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:58,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:58,478 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:58,478 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:58,480 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:58,481 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:58,481 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:58,482 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:58,482 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:58,483 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:58,484 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:58,484 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:58,485 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:58,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:58,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:58,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:58,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:58,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:58,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:58,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:58,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:58,491 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:58,492 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:58,492 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:58,493 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:58,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:58,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:58,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:58,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:58,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:58,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:58,495 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:58,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:58,496 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:58,496 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:58,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:58,497 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_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8428b1c54d08b0acf44cd2a1c42dab6a84cc81171283bdc7e98bc732fc15484a [2023-11-19 04:58:58,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:58,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:58,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:58,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:58,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:58,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i [2023-11-19 04:59:02,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:59:02,659 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:59:02,660 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i [2023-11-19 04:59:02,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/data/e549255d6/5cf7891cb8d14106a23997961002c421/FLAGe583dd715 [2023-11-19 04:59:02,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/data/e549255d6/5cf7891cb8d14106a23997961002c421 [2023-11-19 04:59:02,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:59:02,730 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:59:02,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:02,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:59:02,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:59:02,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:02" (1/1) ... [2023-11-19 04:59:02,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515f5a7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:02, skipping insertion in model container [2023-11-19 04:59:02,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:02" (1/1) ... [2023-11-19 04:59:02,861 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:59:03,087 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 04:59:03,893 WARN L240 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_a0008ed3-ac41-4b56-aec4-f2530679e956/sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i[64323,64336] [2023-11-19 04:59:04,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:04,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:59:04,428 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 04:59:04,541 WARN L240 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_a0008ed3-ac41-4b56-aec4-f2530679e956/sv-benchmarks/c/neural-networks/lunarlander_22_unsafe.c-amalgamation.i[64323,64336] [2023-11-19 04:59:04,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:05,103 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:59:05,112 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:59:05,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05 WrapperNode [2023-11-19 04:59:05,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:05,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:05,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:59:05,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:59:05,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,424 INFO L138 Inliner]: procedures = 621, calls = 5149, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5469 [2023-11-19 04:59:05,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:05,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:59:05,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:59:05,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:59:05,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:59:05,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:59:05,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:59:05,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:59:05,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (1/1) ... [2023-11-19 04:59:05,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:59:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:05,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:59:05,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:59:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 04:59:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:59:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 04:59:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 04:59:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:59:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:59:05,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:59:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:59:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:59:06,209 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:59:06,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:59:22,437 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:59:26,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:59:26,506 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-19 04:59:26,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:26 BoogieIcfgContainer [2023-11-19 04:59:26,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:59:26,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:59:26,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:59:26,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:59:26,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:59:02" (1/3) ... [2023-11-19 04:59:26,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7848bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:26, skipping insertion in model container [2023-11-19 04:59:26,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:05" (2/3) ... [2023-11-19 04:59:26,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7848bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:26, skipping insertion in model container [2023-11-19 04:59:26,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:26" (3/3) ... [2023-11-19 04:59:26,529 INFO L112 eAbstractionObserver]: Analyzing ICFG lunarlander_22_unsafe.c-amalgamation.i [2023-11-19 04:59:26,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:59:26,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:59:26,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:59:26,634 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@45db152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:59:26,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:59:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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) [2023-11-19 04:59:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:59:26,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:26,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:26,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1487389057, now seen corresponding path program 1 times [2023-11-19 04:59:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267828212] [2023-11-19 04:59:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:29,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267828212] [2023-11-19 04:59:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267828212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:29,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:29,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:59:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061180238] [2023-11-19 04:59:29,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:29,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:29,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:29,129 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:29,597 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2023-11-19 04:59:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:59:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:29,611 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:59:29,611 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:59:29,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:29,621 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:29,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:59:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:59:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:59:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 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) [2023-11-19 04:59:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2023-11-19 04:59:29,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 9 [2023-11-19 04:59:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:29,666 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2023-11-19 04:59:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2023-11-19 04:59:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:59:29,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:29,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:29,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:59:29,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:29,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1180039238, now seen corresponding path program 1 times [2023-11-19 04:59:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540899359] [2023-11-19 04:59:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:29,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:31,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540899359] [2023-11-19 04:59:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540899359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401410468] [2023-11-19 04:59:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:31,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:31,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:31,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:59:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:33,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 6070 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:59:34,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:34,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401410468] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:34,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:59:34,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 04:59:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679163664] [2023-11-19 04:59:34,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:34,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:34,090 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:34,619 INFO L93 Difference]: Finished difference Result 28 states and 46 transitions. [2023-11-19 04:59:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 04:59:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:34,621 INFO L225 Difference]: With dead ends: 28 [2023-11-19 04:59:34,621 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:59:34,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:34,623 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:34,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:59:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:59:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:59:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 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) [2023-11-19 04:59:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2023-11-19 04:59:34,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 10 [2023-11-19 04:59:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:34,634 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2023-11-19 04:59:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2023-11-19 04:59:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:59:34,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:34,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:34,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:34,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:34,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:34,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1515033355, now seen corresponding path program 1 times [2023-11-19 04:59:34,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:34,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735301649] [2023-11-19 04:59:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:36,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735301649] [2023-11-19 04:59:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735301649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:36,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285779749] [2023-11-19 04:59:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:36,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:36,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:59:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:38,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 6082 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:59:38,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:38,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:59:38,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285779749] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:38,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:59:38,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 04:59:38,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511392017] [2023-11-19 04:59:38,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:38,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:38,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:38,576 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:38,974 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2023-11-19 04:59:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 04:59:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:38,976 INFO L225 Difference]: With dead ends: 25 [2023-11-19 04:59:38,976 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 04:59:38,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:38,978 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:38,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:59:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 04:59:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 04:59:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2023-11-19 04:59:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2023-11-19 04:59:38,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 11 [2023-11-19 04:59:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:38,984 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2023-11-19 04:59:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2023-11-19 04:59:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:59:38,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:38,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:39,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:39,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:39,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:39,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -269438997, now seen corresponding path program 1 times [2023-11-19 04:59:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:39,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687420603] [2023-11-19 04:59:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:59:40,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:40,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687420603] [2023-11-19 04:59:40,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687420603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189891344] [2023-11-19 04:59:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:40,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:40,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:40,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:59:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:42,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 6094 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:59:42,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:59:42,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:42,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189891344] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:42,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:59:42,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-19 04:59:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981097671] [2023-11-19 04:59:42,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:42,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:42,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:42,571 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:42,982 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-11-19 04:59:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:59:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:42,983 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:59:42,983 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 04:59:42,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:42,985 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:42,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:59:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 04:59:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-19 04:59:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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) [2023-11-19 04:59:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2023-11-19 04:59:42,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 12 [2023-11-19 04:59:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:42,991 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2023-11-19 04:59:42,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:59:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2023-11-19 04:59:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:59:42,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:42,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:43,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:43,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:43,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash 527032912, now seen corresponding path program 1 times [2023-11-19 04:59:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351315184] [2023-11-19 04:59:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:44,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351315184] [2023-11-19 04:59:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351315184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468338678] [2023-11-19 04:59:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:44,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:44,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0008ed3-ac41-4b56-aec4-f2530679e956/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:59:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:46,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 6100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:59:46,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:46,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:59:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468338678] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:46,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:59:46,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 7 [2023-11-19 04:59:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159588242] [2023-11-19 04:59:46,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:46,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42