./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2 --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 cf7f7457cdd0c5557ed6396b1b77324a2673e1bc1f66f80f06950a47fe88485c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:28:10,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:28:10,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:28:10,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:28:10,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:28:10,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:28:10,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:28:10,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:28:10,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:28:10,346 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:28:10,346 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:28:10,346 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:28:10,347 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:28:10,347 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:28:10,347 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:28:10,348 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:28:10,348 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:28:10,349 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:28:10,349 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:28:10,349 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:28:10,350 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:28:10,350 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:28:10,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:28:10,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:28:10,351 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:28:10,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:28:10,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:28:10,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:28:10,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:28:10,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:28:10,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:28:10,354 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:28:10,354 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:28:10,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:28:10,355 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:28:10,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:28:10,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:28:10,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:28:10,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:10,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:28:10,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:28:10,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:28:10,360 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:28:10,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:28:10,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:28:10,361 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:28:10,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:28:10,361 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_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f7457cdd0c5557ed6396b1b77324a2673e1bc1f66f80f06950a47fe88485c [2024-11-02 12:28:10,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:28:10,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:28:10,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:28:10,677 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:28:10,678 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:28:10,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/gcd_2+newton_3_3.i Unable to find full path for "g++" [2024-11-02 12:28:13,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:13,248 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:13,249 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/sv-benchmarks/c/combinations/gcd_2+newton_3_3.i [2024-11-02 12:28:13,258 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/data/0cf46be42/3e01404939904c80a575c41a5e95b5f8/FLAGc9f0f6fb5 [2024-11-02 12:28:13,632 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/data/0cf46be42/3e01404939904c80a575c41a5e95b5f8 [2024-11-02 12:28:13,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:13,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:13,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:13,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:13,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:13,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:13,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4821d6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13, skipping insertion in model container [2024-11-02 12:28:13,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:13,670 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:13,853 WARN L251 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_57178326-3985-4edf-b33c-23f19b81dcee/sv-benchmarks/c/combinations/gcd_2+newton_3_3.i[1226,1239] [2024-11-02 12:28:13,893 WARN L251 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_57178326-3985-4edf-b33c-23f19b81dcee/sv-benchmarks/c/combinations/gcd_2+newton_3_3.i[2862,2875] [2024-11-02 12:28:13,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:13,909 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:13,929 WARN L251 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_57178326-3985-4edf-b33c-23f19b81dcee/sv-benchmarks/c/combinations/gcd_2+newton_3_3.i[1226,1239] [2024-11-02 12:28:13,940 WARN L251 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_57178326-3985-4edf-b33c-23f19b81dcee/sv-benchmarks/c/combinations/gcd_2+newton_3_3.i[2862,2875] [2024-11-02 12:28:13,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:13,962 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:13,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13 WrapperNode [2024-11-02 12:28:13,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:13,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:13,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:13,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:13,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:13,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,000 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 91 [2024-11-02 12:28:14,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:14,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:14,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:14,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:14,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,028 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:14,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:14,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:14,041 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:14,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (1/1) ... [2024-11-02 12:28:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:14,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:14,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:14,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:28:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-11-02 12:28:14,121 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-11-02 12:28:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-02 12:28:14,121 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-02 12:28:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:28:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:14,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:14,214 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:14,219 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:14,467 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:14,468 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:14,533 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:14,533 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:28:14,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:14 BoogieIcfgContainer [2024-11-02 12:28:14,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:14,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:14,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:14,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:14,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:13" (1/3) ... [2024-11-02 12:28:14,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bd7982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:14, skipping insertion in model container [2024-11-02 12:28:14,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:13" (2/3) ... [2024-11-02 12:28:14,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bd7982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:14, skipping insertion in model container [2024-11-02 12:28:14,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:14" (3/3) ... [2024-11-02 12:28:14,549 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_3.i [2024-11-02 12:28:14,570 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:14,570 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:28:14,631 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:14,637 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bcb72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:14,638 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:28:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:28:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:28:14,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:14,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:28:14,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:14,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash -377832024, now seen corresponding path program 1 times [2024-11-02 12:28:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618953085] [2024-11-02 12:28:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:15,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618953085] [2024-11-02 12:28:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618953085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:15,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:28:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537357381] [2024-11-02 12:28:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:15,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:28:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:28:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:28:15,197 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:15,276 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-02 12:28:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:28:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:15,287 INFO L225 Difference]: With dead ends: 38 [2024-11-02 12:28:15,288 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:28:15,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:28:15,298 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:15,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:28:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 12:28:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:28:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-02 12:28:15,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2024-11-02 12:28:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:15,384 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-02 12:28:15,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-02 12:28:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:28:15,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:15,386 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:15,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:28:15,387 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:15,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1099445991, now seen corresponding path program 1 times [2024-11-02 12:28:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:15,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057138983] [2024-11-02 12:28:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:15,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057138983] [2024-11-02 12:28:15,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057138983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409988269] [2024-11-02 12:28:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:15,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:15,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:15,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:15,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:28:15,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:16,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409988269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232230089] [2024-11-02 12:28:16,615 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:28:16,615 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:16,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:16,625 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:16,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:18,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:18,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:28:18,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:18,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-02 12:28:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904830255] [2024-11-02 12:28:18,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:18,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:28:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:28:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:28:18,666 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:18,920 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-02 12:28:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:28:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 [2024-11-02 12:28:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:18,925 INFO L225 Difference]: With dead ends: 32 [2024-11-02 12:28:18,925 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:28:18,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:28:18,927 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:18,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:28:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 12:28:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:28:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-02 12:28:18,954 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2024-11-02 12:28:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:18,955 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-02 12:28:18,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-02 12:28:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:28:18,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:18,957 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:18,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:19,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:19,158 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:19,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1034851688, now seen corresponding path program 2 times [2024-11-02 12:28:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:19,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388070170] [2024-11-02 12:28:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388070170] [2024-11-02 12:28:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388070170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427854412] [2024-11-02 12:28:21,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:21,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:21,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:21,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57178326-3985-4edf-b33c-23f19b81dcee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:21,400 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:28:21,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:21,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-02 12:28:21,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:47,013 WARN L851 $PredicateComparison]: unable to prove that (and (let ((.cse26 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (let ((.cse11 (mod |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse12 (mod .cse26 256))) (let ((.cse19 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse29 (<= 128 .cse12)) (.cse30 (<= .cse11 127)) (.cse6 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse2 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) (.cse31 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) (or (and (let ((.cse22 (mod .cse2 256))) (or (and (let ((.cse0 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse1 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse3 (+ .cse22 (- 256)))) (or (and .cse0 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse5 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse3))) (let ((.cse4 (+ (- 256) (mod (+ .cse2 .cse5) 256)))) (let ((.cse7 (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse1 (mod (+ .cse2 (mod .cse3 .cse4) .cse5) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= 128 (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse5) 256)) (= .cse6 (mod (+ .cse7 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse7 0))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse9 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse3))) (let ((.cse8 (+ (- 256) (mod (+ .cse2 .cse9) 256)))) (let ((.cse10 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse1 (mod (+ .cse2 (mod .cse3 .cse8) .cse9) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse9) 256) 127) (= .cse6 (mod (+ .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse10 0))))))) (and (<= 128 .cse11) (<= .cse12 127) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse14 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse3))) (let ((.cse15 (+ (- 256) (mod (+ .cse2 .cse14) 256)))) (let ((.cse13 (mod .cse3 .cse15))) (and (= .cse1 (mod (+ .cse2 .cse13 .cse14) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (= (mod .cse15 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (not (= .cse13 0)) (<= 128 (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse14) 256))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse17 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse3))) (let ((.cse18 (+ (- 256) (mod (+ .cse2 .cse17) 256)))) (let ((.cse16 (mod .cse3 .cse18))) (and (= .cse1 (mod (+ .cse2 .cse16 .cse17) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse17) 256) 127) (= (mod .cse18 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (not (= .cse16 0)))))))) .cse19))) (and .cse0 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse21 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse3))) (let ((.cse20 (mod .cse3 .cse21))) (and (not (= .cse20 0)) (not (= .cse21 0)) (= (mod .cse21 |c_ULTIMATE.start_gcd_test_~a#1|) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= .cse1 (mod (+ .cse20 (* 255 .cse21)) 256))))))))) (<= 128 .cse22)) (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse25 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (let ((.cse23 (+ (- 256) (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse25) 256)))) (let ((.cse24 (mod .cse23 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= (mod .cse22 .cse23) |c_ULTIMATE.start_gcd_test_~a#1|) (not (= .cse24 0)) (<= (+ .cse22 .cse25) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (= (mod (+ .cse26 .cse24) 256) .cse6)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse28 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (let ((.cse27 (+ (- 256) (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse28) 256)))) (and (= (mod .cse22 .cse27) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ .cse22 .cse28) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (= (mod .cse27 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) .cse19 .cse29 .cse30)) .cse31) (and .cse31 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse32 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse22 .cse32)) (<= 128 (+ .cse22 .cse32)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod .cse32 |c_ULTIMATE.start_gcd_test_~a#1|) |c_ULTIMATE.start_gcd_test_~b#1|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse33 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (and (= (mod .cse33 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse22 .cse33)) (<= 128 (+ .cse22 .cse33)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|)))) .cse19 .cse29 .cse30))) (and (or (and .cse19 .cse29 .cse30 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse35 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (let ((.cse34 (+ (- 256) (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse35) 256)))) (and (= (mod .cse22 .cse34) |c_ULTIMATE.start_gcd_test_~a#1|) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= 128 (+ .cse22 .cse35)) (= (mod .cse34 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse38 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (let ((.cse36 (+ (- 256) (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse38) 256)))) (let ((.cse37 (mod .cse36 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= (mod .cse22 .cse36) |c_ULTIMATE.start_gcd_test_~a#1|) (not (= .cse37 0)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= 128 (+ .cse22 .cse38)) (= (mod (+ .cse26 .cse37) 256) .cse6))))))) .cse31) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse39 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse22 .cse39)) (<= (+ .cse22 .cse39) 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (not (= .cse39 0)) (= (mod .cse39 |c_ULTIMATE.start_gcd_test_~a#1|) |c_ULTIMATE.start_gcd_test_~b#1|)))) (and .cse19 .cse29 .cse30 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse40 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| .cse22))) (and (= (mod .cse40 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse22 .cse40)) (<= (+ .cse22 .cse40) 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (not (= .cse40 0))))))) .cse31)) (not (= .cse22 0)) (<= .cse22 127)))) (<= (+ |c_ULTIMATE.start_main1_~y~0#1| 1) 0)) (and (not (= |c_ULTIMATE.start_main1_~y~0#1| 0)) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse41 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse43 (+ (- 256) (mod (+ .cse2 .cse41) 256)))) (let ((.cse42 (mod .cse43 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= (+ |c_ULTIMATE.start_main1_~y~0#1| .cse41) 127) (= (mod (+ .cse26 .cse42) 256) .cse6) (not (= .cse42 0)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| .cse43) |c_ULTIMATE.start_gcd_test_~a#1|)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse44 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= (+ |c_ULTIMATE.start_main1_~y~0#1| .cse44) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse44 |c_ULTIMATE.start_gcd_test_~a#1|)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod |c_ULTIMATE.start_main1_~y~0#1| .cse44)) (not (= .cse44 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse45 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse45 |c_ULTIMATE.start_gcd_test_~a#1|)) (<= 128 (+ |c_ULTIMATE.start_main1_~y~0#1| .cse45)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod |c_ULTIMATE.start_main1_~y~0#1| .cse45))))) (and .cse19 .cse29 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse47 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse46 (+ (- 256) (mod (+ .cse2 .cse47) 256)))) (and (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (= (mod .cse46 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (<= 128 (+ |c_ULTIMATE.start_main1_~y~0#1| .cse47)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| .cse46) |c_ULTIMATE.start_gcd_test_~a#1|))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse48 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (and (= (mod .cse48 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (<= (+ |c_ULTIMATE.start_main1_~y~0#1| .cse48) 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod |c_ULTIMATE.start_main1_~y~0#1| .cse48)) (not (= .cse48 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse49 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse50 (+ (- 256) (mod (+ .cse2 .cse49) 256)))) (and (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (<= (+ |c_ULTIMATE.start_main1_~y~0#1| .cse49) 127) (= (mod .cse50 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (mod |c_ULTIMATE.start_main1_~y~0#1| .cse50) |c_ULTIMATE.start_gcd_test_~a#1|))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse51 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (and (= (mod .cse51 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (<= 128 (+ |c_ULTIMATE.start_main1_~y~0#1| .cse51)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod |c_ULTIMATE.start_main1_~y~0#1| .cse51)))))) .cse30) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse53 (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse54 (+ (- 256) (mod (+ .cse2 .cse53) 256)))) (let ((.cse52 (mod .cse54 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_30| 1) 0) (= (mod (+ .cse26 .cse52) 256) .cse6) (not (= .cse52 0)) (<= 128 (+ |c_ULTIMATE.start_main1_~y~0#1| .cse53)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| .cse54) |c_ULTIMATE.start_gcd_test_~a#1|))))))) .cse31 (<= 0 |c_ULTIMATE.start_main1_~y~0#1|)))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false