./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --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 a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:04:28,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:04:28,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:04:28,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:04:28,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:04:28,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:04:28,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:04:28,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:04:28,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:04:28,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:04:28,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:04:28,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:04:28,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:04:28,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:04:28,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:04:28,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:04:28,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:04:28,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:04:28,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:04:28,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:04:28,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:04:28,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:04:28,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:04:28,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:04:28,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:04:28,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:04:28,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:04:28,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:04:28,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:04:28,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:04:28,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:04:28,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:04:28,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:04:28,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:04:28,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:04:28,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:04:28,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:04:28,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:04:28,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:04:28,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:04:28,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:04:28,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:04:28,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:04:28,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:04:28,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:04:28,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:04:28,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:04:28,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:04:28,504 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:04:28,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:04:28,505 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:04:28,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:04:28,506 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:04:28,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:04:28,507 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:04:28,507 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:04:28,507 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:04:28,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:04:28,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:04:28,508 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:04:28,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:04:28,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:04:28,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:04:28,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:04:28,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:04:28,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:04:28,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:04:28,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:04:28,511 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:04:28,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:04:28,512 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:04:28,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:04:28,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:04:28,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:04:28,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:28,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:04:28,514 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:04:28,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:04:28,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:04:28,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:04:28,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:04:28,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:04:28,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:04:28,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2022-11-26 01:04:28,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:04:28,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:04:28,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:04:28,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:04:28,819 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:04:28,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-26 01:04:32,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:04:32,313 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:04:32,314 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-26 01:04:32,322 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/data/a319b4b5a/e2653d3fd64b4880996217e3e28a32cf/FLAG436a8720a [2022-11-26 01:04:32,660 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/data/a319b4b5a/e2653d3fd64b4880996217e3e28a32cf [2022-11-26 01:04:32,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:04:32,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:04:32,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:32,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:04:32,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:04:32,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:32,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3047bee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32, skipping insertion in model container [2022-11-26 01:04:32,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:32,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:04:32,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:04:32,914 WARN L237 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_7fdb20e6-2430-496b-a2d8-2fe164be2888/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-26 01:04:32,940 WARN L237 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_7fdb20e6-2430-496b-a2d8-2fe164be2888/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-26 01:04:32,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:32,952 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:04:32,963 WARN L237 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_7fdb20e6-2430-496b-a2d8-2fe164be2888/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-26 01:04:32,975 WARN L237 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_7fdb20e6-2430-496b-a2d8-2fe164be2888/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-26 01:04:32,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:32,992 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:04:32,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32 WrapperNode [2022-11-26 01:04:32,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:32,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:32,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:04:32,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:04:33,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,037 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-26 01:04:33,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:33,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:04:33,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:04:33,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:04:33,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:04:33,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:04:33,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:04:33,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:04:33,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (1/1) ... [2022-11-26 01:04:33,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:33,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:33,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:04:33,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:04:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:04:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-26 01:04:33,180 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-26 01:04:33,180 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-26 01:04:33,180 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-26 01:04:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:04:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:04:33,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:04:33,302 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:04:33,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:04:33,525 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:04:33,589 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:04:33,589 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:04:33,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:33 BoogieIcfgContainer [2022-11-26 01:04:33,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:04:33,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:04:33,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:04:33,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:04:33,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:04:32" (1/3) ... [2022-11-26 01:04:33,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538f7f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:33, skipping insertion in model container [2022-11-26 01:04:33,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:32" (2/3) ... [2022-11-26 01:04:33,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538f7f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:33, skipping insertion in model container [2022-11-26 01:04:33,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:33" (3/3) ... [2022-11-26 01:04:33,602 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_6.i [2022-11-26 01:04:33,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:04:33,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 01:04:33,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:04:33,692 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=LoopsAndPotentialCycles, 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;@292c33cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:04:33,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 01:04:33,697 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) [2022-11-26 01:04:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:04:33,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:33,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:04:33,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2022-11-26 01:04:33,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947548971] [2022-11-26 01:04:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:33,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:04:33,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821926362] [2022-11-26 01:04:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:33,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:33,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:33,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:04:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:04:34,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:34,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:34,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947548971] [2022-11-26 01:04:34,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:04:34,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821926362] [2022-11-26 01:04:34,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821926362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:34,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:34,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521753585] [2022-11-26 01:04:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:34,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:34,212 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 01:04:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:34,306 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-26 01:04:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-26 01:04:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:34,318 INFO L225 Difference]: With dead ends: 37 [2022-11-26 01:04:34,318 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 01:04:34,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:34,325 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:34,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 01:04:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 01:04:34,366 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) [2022-11-26 01:04:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 01:04:34,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2022-11-26 01:04:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:34,369 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 01:04:34,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 01:04:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 01:04:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:04:34,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:34,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:34,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:04:34,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:34,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2022-11-26 01:04:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:34,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313949419] [2022-11-26 01:04:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:34,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:04:34,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063537928] [2022-11-26 01:04:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:34,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:34,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:04:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:04:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:34,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313949419] [2022-11-26 01:04:34,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:04:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063537928] [2022-11-26 01:04:34,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063537928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858813012] [2022-11-26 01:04:34,845 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 01:04:34,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:34,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:34,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:34,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:35,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:35,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:35,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:35,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:04:35,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-26 01:04:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302629061] [2022-11-26 01:04:35,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:04:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:04:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:04:35,697 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:35,799 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-26 01:04:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:04:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:35,801 INFO L225 Difference]: With dead ends: 28 [2022-11-26 01:04:35,801 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 01:04:35,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:04:35,803 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:35,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 01:04:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-26 01:04:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2022-11-26 01:04:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-26 01:04:35,813 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2022-11-26 01:04:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:35,814 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-26 01:04:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-26 01:04:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:04:35,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:35,817 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:35,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:36,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2022-11-26 01:04:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:36,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571907087] [2022-11-26 01:04:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:36,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:04:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916981343] [2022-11-26 01:04:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:04:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:36,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:36,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:04:47,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:04:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:04:47,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 01:04:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:09,836 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:28,222 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 47 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:43,969 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))))) is different from false [2022-11-26 01:06:17,841 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) is different from false [2022-11-26 01:06:37,378 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from false [2022-11-26 01:06:39,389 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from true [2022-11-26 01:06:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 01:06:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:50,667 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse33 (mod (+ .cse32 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse34 (mod (+ .cse32 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse18 (mod .cse32 256)) (.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse34 127)) (.cse0 (<= .cse33 127)) (.cse25 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse27 (= .cse33 0)) (.cse28 (= |c_ULTIMATE.start_main1_~y~0#1| .cse33)) (.cse29 (= .cse34 0)) (.cse30 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0))) (.cse13 (not .cse19)) (.cse31 (= |c_ULTIMATE.start_main1_~y~0#1| .cse34)) (.cse20 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse11 (= .cse34 .cse20)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse34)) 256) 0))) (.cse6 (or .cse29 .cse30 .cse13 .cse31)) (.cse17 (or .cse25 .cse13 .cse27 .cse28)) (.cse3 (not .cse0)) (.cse8 (not .cse9)) (.cse14 (not .cse5)) (.cse15 (= .cse33 .cse20)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256) 0))) (.cse21 (<= .cse18 127))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse18)) 256) 0)) .cse19 (= .cse18 .cse20)))) (let ((.cse4 (or .cse14 (and .cse17 .cse7))) (.cse1 (or .cse14 (and .cse7 (or .cse15 .cse16 .cse13))))) (and (or (let ((.cse2 (or .cse5 (and .cse6 .cse7)))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse2)))) .cse8) (or .cse9 (let ((.cse10 (or (and .cse7 (or .cse11 .cse12 .cse13)) .cse5))) (and (or .cse3 (and .cse10 .cse4)) (or .cse0 (and .cse10 .cse1)))))))) .cse21) (or (let ((.cse24 (or .cse19 (= |c_ULTIMATE.start_main1_~y~0#1| .cse18) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)) (= .cse18 0))) (.cse26 (= .cse32 0))) (let ((.cse22 (or .cse14 (and .cse24 (or .cse26 .cse15 .cse16 .cse13))))) (and (or .cse9 (let ((.cse23 (or (and .cse24 (or .cse26 .cse11 .cse12 .cse13)) .cse5))) (and (or (and .cse22 .cse23) .cse0) (or (and (or .cse14 (and .cse24 (or .cse25 .cse26 .cse13 .cse27 .cse28))) .cse23) .cse3)))) (or (and (or (and (or (and .cse6 .cse24) .cse5) (or .cse14 (and .cse24 .cse17))) .cse3) (or .cse0 (and (or (and .cse24 (or .cse26 .cse29 .cse30 .cse13 .cse31)) .cse5) .cse22))) .cse8)))) (not .cse21))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-26 01:09:38,491 WARN L233 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 45 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:25,953 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse1 (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (not (<= .cse1 127)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0)) (= .cse0 0))))) is different from false [2022-11-26 01:10:27,956 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse1 (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (not (<= .cse1 127)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0)) (= .cse0 0))))) is different from true [2022-11-26 01:10:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 01:10:27,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571907087] [2022-11-26 01:10:27,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916981343] [2022-11-26 01:10:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916981343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140912324] [2022-11-26 01:10:27,960 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 01:10:27,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:27,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:27,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:27,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:30,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:48,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:48,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:48,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:48,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-26 01:10:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338412845] [2022-11-26 01:10:48,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:48,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:10:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:10:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=137, Unknown=18, NotChecked=140, Total=342 [2022-11-26 01:10:48,906 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-11-26 01:10:50,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 01:10:53,944 WARN L859 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse2 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse1 (<= .cse2 127))) (and (let ((.cse0 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse0 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse1 (= .cse0 0))) (let ((.cse3 (mod (mod .cse2 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse3) 256) 0)) (= .cse3 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0)))) is different from true [2022-11-26 01:10:55,952 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse0 127)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse0)))) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse1 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1))))) (or (let ((.cse34 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse35 (mod (+ .cse34 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse36 (mod (+ .cse34 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse20 (mod .cse34 256)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse11 (<= .cse36 127)) (.cse2 (<= .cse35 127)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse35) 256) 0))) (.cse29 (= .cse35 0)) (.cse30 (= |c_ULTIMATE.start_main1_~y~0#1| .cse35)) (.cse31 (= .cse36 0)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse36) 256) 0))) (.cse15 (not .cse21)) (.cse33 (= |c_ULTIMATE.start_main1_~y~0#1| .cse36)) (.cse22 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse13 (= .cse36 .cse22)) (.cse14 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse36)) 256) 0))) (.cse8 (or .cse31 .cse32 .cse15 .cse33)) (.cse19 (or .cse27 .cse15 .cse29 .cse30)) (.cse5 (not .cse2)) (.cse10 (not .cse11)) (.cse16 (not .cse7)) (.cse17 (= .cse35 .cse22)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse35)) 256) 0))) (.cse23 (<= .cse20 127))) (and (or (let ((.cse9 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse20)) 256) 0)) .cse21 (= .cse20 .cse22)))) (let ((.cse6 (or .cse16 (and .cse19 .cse9))) (.cse3 (or .cse16 (and .cse9 (or .cse17 .cse18 .cse15))))) (and (or (let ((.cse4 (or .cse7 (and .cse8 .cse9)))) (and (or .cse2 (and .cse3 .cse4)) (or .cse5 (and .cse6 .cse4)))) .cse10) (or .cse11 (let ((.cse12 (or (and .cse9 (or .cse13 .cse14 .cse15)) .cse7))) (and (or .cse5 (and .cse12 .cse6)) (or .cse2 (and .cse12 .cse3)))))))) .cse23) (or (let ((.cse26 (or .cse21 (= |c_ULTIMATE.start_main1_~y~0#1| .cse20) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0)) (= .cse20 0))) (.cse28 (= .cse34 0))) (let ((.cse24 (or .cse16 (and .cse26 (or .cse28 .cse17 .cse18 .cse15))))) (and (or .cse11 (let ((.cse25 (or (and .cse26 (or .cse28 .cse13 .cse14 .cse15)) .cse7))) (and (or (and .cse24 .cse25) .cse2) (or (and (or .cse16 (and .cse26 (or .cse27 .cse28 .cse15 .cse29 .cse30))) .cse25) .cse5)))) (or (and (or (and (or (and .cse8 .cse26) .cse7) (or .cse16 (and .cse26 .cse19))) .cse5) (or .cse2 (and (or (and .cse26 (or .cse28 .cse31 .cse32 .cse15 .cse33)) .cse7) .cse24))) .cse10)))) (not .cse23))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) is different from false [2022-11-26 01:11:44,857 WARN L233 SmtUtils]: Spent 45.29s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:46,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:11:48,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:11:50,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:11:52,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:11:54,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:11:56,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:11:58,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:12:00,911 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] [2022-11-26 01:12:02,919 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))))) is different from false [2022-11-26 01:12:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:03,552 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-26 01:12:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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 8 [2022-11-26 01:12:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:03,553 INFO L225 Difference]: With dead ends: 29 [2022-11-26 01:12:03,553 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 01:12:03,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 185.4s TimeCoverageRelationStatistics Valid=58, Invalid=162, Unknown=22, NotChecked=264, Total=506 [2022-11-26 01:12:03,560 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:03,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 72 Unchecked, 18.7s Time] [2022-11-26 01:12:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 01:12:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-26 01:12:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-11-26 01:12:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-26 01:12:03,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-11-26 01:12:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:03,572 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-26 01:12:03,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-11-26 01:12:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-26 01:12:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:12:03,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:03,574 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:03,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 01:12:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:03,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1814613500, now seen corresponding path program 3 times [2022-11-26 01:12:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484078328] [2022-11-26 01:12:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:03,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:12:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655535873] [2022-11-26 01:12:03,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:12:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:03,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:03,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fdb20e6-2430-496b-a2d8-2fe164be2888/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:12:11,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:12:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 01:12:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:43,123 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:57,730 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= (mod .cse0 256) |c_ULTIMATE.start_gcd_test_~b#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (not (<= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse0) 256) 127)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256) |c_ULTIMATE.start_gcd_test_~a#1|))) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-26 01:13:41,618 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (= (mod (mod .cse0 .cse1) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from false [2022-11-26 01:14:07,778 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod .cse0 .cse1) 256) 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from false [2022-11-26 01:14:09,781 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod .cse0 .cse1) 256) 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from true [2022-11-26 01:14:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-26 01:14:32,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:18:11,944 WARN L233 SmtUtils]: Spent 2.73m on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)