./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/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 8b7456a459f55f53693cf2fdc2ecfa85b54010339cb65d2080cc061b58d33cf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:24:22,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:24:22,522 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:24:22,528 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:24:22,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:24:22,560 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:24:22,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:24:22,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:24:22,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:24:22,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:24:22,565 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:24:22,566 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:24:22,567 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:24:22,568 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:24:22,569 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:24:22,569 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:24:22,570 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:24:22,571 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:24:22,572 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:24:22,573 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:24:22,574 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:24:22,575 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:24:22,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:24:22,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:24:22,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:24:22,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:24:22,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:24:22,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:24:22,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:24:22,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:24:22,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:24:22,583 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:24:22,583 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:24:22,584 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:24:22,584 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:24:22,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:24:22,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:22,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:24:22,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:24:22,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:24:22,588 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:24:22,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:24:22,589 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:24:22,590 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:24:22,590 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:24:22,590 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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b7456a459f55f53693cf2fdc2ecfa85b54010339cb65d2080cc061b58d33cf8 [2023-11-19 05:24:22,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:24:23,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:24:23,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:24:23,015 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:24:23,015 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:24:23,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i [2023-11-19 05:24:26,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:24:26,664 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:24:26,664 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i [2023-11-19 05:24:26,679 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/data/77d1bf328/8a3343c769d348babce0d7ec836c8898/FLAGea2afba9e [2023-11-19 05:24:26,701 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/data/77d1bf328/8a3343c769d348babce0d7ec836c8898 [2023-11-19 05:24:26,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:24:26,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:24:26,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:26,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:24:26,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:24:26,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:26" (1/1) ... [2023-11-19 05:24:26,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b384e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:26, skipping insertion in model container [2023-11-19 05:24:26,731 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:26" (1/1) ... [2023-11-19 05:24:26,761 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:24:27,006 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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[1226,1239] [2023-11-19 05:24:27,055 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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[2841,2854] [2023-11-19 05:24:27,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:27,078 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:24:27,106 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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[1226,1239] [2023-11-19 05:24:27,128 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_a99687bb-9d7d-4a85-9d40-e45b56632c0b/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[2841,2854] [2023-11-19 05:24:27,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:27,154 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:24:27,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27 WrapperNode [2023-11-19 05:24:27,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:27,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:27,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:24:27,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:24:27,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,213 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-19 05:24:27,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:27,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:24:27,214 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:24:27,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:24:27,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,228 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:24:27,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:24:27,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:24:27,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:24:27,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (1/1) ... [2023-11-19 05:24:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:27,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:24:27,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:24:27,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:24:27,338 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-19 05:24:27,338 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-19 05:24:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-19 05:24:27,339 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-19 05:24:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:24:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:24:27,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:24:27,410 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:24:27,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:24:27,608 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:24:27,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:24:27,698 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:24:27,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:27 BoogieIcfgContainer [2023-11-19 05:24:27,709 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:24:27,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:24:27,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:24:27,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:24:27,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:26" (1/3) ... [2023-11-19 05:24:27,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9643bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:27, skipping insertion in model container [2023-11-19 05:24:27,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:27" (2/3) ... [2023-11-19 05:24:27,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9643bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:27, skipping insertion in model container [2023-11-19 05:24:27,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:27" (3/3) ... [2023-11-19 05:24:27,734 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_1.i [2023-11-19 05:24:27,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:24:27,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:24:27,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:24:27,807 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;@adc503e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:24:27,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:24:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:24:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 05:24:27,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:27,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 05:24:27,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:27,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash -499021812, now seen corresponding path program 1 times [2023-11-19 05:24:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:27,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502593916] [2023-11-19 05:24:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:28,616 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 05:24:28,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502593916] [2023-11-19 05:24:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502593916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:28,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:28,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:24:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309911955] [2023-11-19 05:24:28,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:28,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:24:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:24:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:24:28,698 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2023-11-19 05:24:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:28,861 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-19 05:24:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:24:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2023-11-19 05:24:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:28,873 INFO L225 Difference]: With dead ends: 37 [2023-11-19 05:24:28,874 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 05:24:28,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:28,884 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:28,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:24:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 05:24:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 05:24:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:24:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-19 05:24:28,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2023-11-19 05:24:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:28,949 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-19 05:24:28,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2023-11-19 05:24:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-19 05:24:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:24:28,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:28,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:28,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:24:28,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1643785969, now seen corresponding path program 1 times [2023-11-19 05:24:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:28,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838371015] [2023-11-19 05:24:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:28,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:24:28,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479490764] [2023-11-19 05:24:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:28,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:28,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:29,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:24:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:29,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 05:24:29,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:45,303 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 05:24:45,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:52,214 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 05:24:52,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838371015] [2023-11-19 05:24:52,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:24:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479490764] [2023-11-19 05:24:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479490764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:24:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939686797] [2023-11-19 05:24:52,238 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 05:24:52,238 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:24:52,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:24:52,246 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:24:52,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:24:54,210 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:02,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main1_~x~0#1|) (<= (+ |ULTIMATE.start_main1_~x~0#1| 1) |ULTIMATE.start_main1_~g~0#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)))' at error location [2023-11-19 05:25:02,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:25:02,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:02,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 05:25:02,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898689588] [2023-11-19 05:25:02,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:25:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:25:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:25:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=164, Unknown=10, NotChecked=0, Total=210 [2023-11-19 05:25:02,540 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 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 05:25:04,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 05:25:07,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 05:25:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:15,454 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-11-19 05:25:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:25:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 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 7 [2023-11-19 05:25:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:15,457 INFO L225 Difference]: With dead ends: 30 [2023-11-19 05:25:15,457 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 05:25:15,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=54, Invalid=237, Unknown=15, NotChecked=0, Total=306 [2023-11-19 05:25:15,460 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:15,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 5.1s Time] [2023-11-19 05:25:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 05:25:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 05:25:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:25:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-19 05:25:15,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 7 [2023-11-19 05:25:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:15,476 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-19 05:25:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 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 05:25:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-19 05:25:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:25:15,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:15,478 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:15,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:15,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:15,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:15,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1587976524, now seen corresponding path program 2 times [2023-11-19 05:25:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:15,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028504443] [2023-11-19 05:25:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:15,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:15,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894072861] [2023-11-19 05:25:15,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:25:15,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:15,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:15,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:15,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a99687bb-9d7d-4a85-9d40-e45b56632c0b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:25:15,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:25:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:25:15,827 WARN L260 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 05:25:15,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:25,592 WARN L854 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse5 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse8 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (.cse0 (<= 128 .cse5)) (.cse1 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse3 (+ .cse5 (- 256))) (.cse4 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse6 (<= .cse5 127)) (.cse9 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) (.cse12 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) (or (and (or (and .cse0 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse2 (mod .cse3 |v_ULTIMATE.start_gcd_test_~a#1_34|))) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_34| 0)) (= .cse1 (mod (+ .cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_34|)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_34| 127) (not (= .cse2 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 256))))) .cse4) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_34| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_34| 127) (= (mod (mod .cse5 |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 256)))) .cse6 .cse7)) .cse8) (and .cse8 (or (and .cse0 (or (and .cse9 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse10 (mod .cse3 |v_ULTIMATE.start_gcd_test_~a#1_34|))) (and (not (= .cse10 0)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse1 (mod (+ .cse10 |v_ULTIMATE.start_gcd_test_~a#1_34|) 256)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse11 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse11 0)) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse11) 256) .cse12) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= .cse1 (mod (+ (mod .cse3 |v_ULTIMATE.start_gcd_test_~a#1_34|) |v_ULTIMATE.start_gcd_test_~a#1_34|) 256)))))) .cse4) (and .cse6 .cse7 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse13 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse13 0)) (= (mod (mod .cse5 |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= (mod (+ .cse14 .cse13) 256) .cse12)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (and (= (mod (mod .cse5 |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse9))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_34| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_34| 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 256)))) .cse7 .cse15) (and (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse9) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse16 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse16 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_34| 1) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (= (mod (+ .cse14 .cse16) 256) .cse12))))) .cse7 .cse15))))) is different from false