./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh --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 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde --- 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-2329fc7 [2022-12-14 08:18:25,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:18:25,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:18:25,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:18:25,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:18:25,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:18:25,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:18:25,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:18:25,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:18:25,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:18:25,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:18:25,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:18:25,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:18:25,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:18:25,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:18:25,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:18:25,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:18:25,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:18:25,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:18:25,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:18:25,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:18:25,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:18:25,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:18:25,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:18:25,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:18:25,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:18:25,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:18:25,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:18:25,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:18:25,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:18:25,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:18:25,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:18:25,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:18:25,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:18:25,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:18:25,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:18:25,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:18:25,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:18:25,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:18:25,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:18:25,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:18:25,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:18:25,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:18:25,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:18:25,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:18:25,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:18:25,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:18:25,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:18:25,466 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:18:25,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:18:25,467 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:18:25,468 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:18:25,468 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:18:25,468 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:18:25,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:18:25,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:18:25,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:18:25,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:18:25,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:18:25,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:18:25,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:18:25,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:18:25,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:18:25,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:18:25,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:18:25,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:18:25,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:18:25,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:18:25,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:18:25,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:18:25,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:18:25,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:18:25,472 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_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde [2022-12-14 08:18:25,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:18:25,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:18:25,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:18:25,681 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:18:25,681 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:18:25,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/gcd_1.c [2022-12-14 08:18:28,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:18:28,433 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:18:28,433 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/sv-benchmarks/c/bitvector/gcd_1.c [2022-12-14 08:18:28,438 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/data/a974dd136/87e5d5f78be64a8a86805202b505c258/FLAG69d1d21b1 [2022-12-14 08:18:28,448 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/data/a974dd136/87e5d5f78be64a8a86805202b505c258 [2022-12-14 08:18:28,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:18:28,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:18:28,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:18:28,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:18:28,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:18:28,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64202fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28, skipping insertion in model container [2022-12-14 08:18:28,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:18:28,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:18:28,582 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_b5dc0b8d-e14c-4322-9106-e338417f7af3/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2022-12-14 08:18:28,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:18:28,605 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:18:28,617 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_b5dc0b8d-e14c-4322-9106-e338417f7af3/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2022-12-14 08:18:28,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:18:28,634 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:18:28,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28 WrapperNode [2022-12-14 08:18:28,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:18:28,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:18:28,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:18:28,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:18:28,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,660 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-12-14 08:18:28,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:18:28,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:18:28,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:18:28,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:18:28,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,675 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:18:28,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:18:28,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:18:28,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:18:28,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (1/1) ... [2022-12-14 08:18:28,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:18:28,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:18:28,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:18:28,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:18:28,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:18:28,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:18:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:18:28,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:18:28,792 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:18:28,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:18:28,885 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:18:28,917 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:18:28,917 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:18:28,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:18:28 BoogieIcfgContainer [2022-12-14 08:18:28,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:18:28,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:18:28,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:18:28,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:18:28,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:18:28" (1/3) ... [2022-12-14 08:18:28,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1b2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:18:28, skipping insertion in model container [2022-12-14 08:18:28,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:18:28" (2/3) ... [2022-12-14 08:18:28,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1b2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:18:28, skipping insertion in model container [2022-12-14 08:18:28,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:18:28" (3/3) ... [2022-12-14 08:18:28,927 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2022-12-14 08:18:28,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:18:28,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:18:28,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:18:28,993 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;@51184624, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:18:28,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:18:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) 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) [2022-12-14 08:18:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:18:29,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:18:29,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:18:29,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:18:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:18:29,006 INFO L85 PathProgramCache]: Analyzing trace with hash 78464818, now seen corresponding path program 1 times [2022-12-14 08:18:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:18:29,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610611547] [2022-12-14 08:18:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:18:29,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:18:29,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728320336] [2022-12-14 08:18:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:29,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:18:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:18:29,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:18:29,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:18:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:18:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:18:29,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:18:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:18:29,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:18:29,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:18:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610611547] [2022-12-14 08:18:29,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:18:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728320336] [2022-12-14 08:18:29,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728320336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:18:29,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:18:29,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:18:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220880267] [2022-12-14 08:18:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:18:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:18:29,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:18:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:18:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:18:29,242 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 08:18:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:18:29,270 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-12-14 08:18:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:18:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-12-14 08:18:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:18:29,279 INFO L225 Difference]: With dead ends: 16 [2022-12-14 08:18:29,279 INFO L226 Difference]: Without dead ends: 7 [2022-12-14 08:18:29,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:18:29,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:18:29,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:18:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-12-14 08:18:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-12-14 08:18:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2022-12-14 08:18:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-12-14 08:18:29,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2022-12-14 08:18:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:18:29,308 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-12-14 08:18:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 08:18:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-12-14 08:18:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:18:29,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:18:29,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:18:29,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:18:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 08:18:29,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:18:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:18:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1863460343, now seen corresponding path program 1 times [2022-12-14 08:18:29,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:18:29,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171857142] [2022-12-14 08:18:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:18:29,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:18:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659449178] [2022-12-14 08:18:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:18:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:18:29,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:18:29,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:18:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:18:29,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:18:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:18:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:18:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:18:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:18:29,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:18:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171857142] [2022-12-14 08:18:29,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:18:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659449178] [2022-12-14 08:18:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659449178] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:18:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280040336] [2022-12-14 08:18:29,913 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 08:18:29,913 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:18:29,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:18:29,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:18:29,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:18:30,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:18:30,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '96#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 128)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#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___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_main_~y~0#1|) 1 0)) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:18:30,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:18:30,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:18:30,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-14 08:18:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051624243] [2022-12-14 08:18:30,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:18:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:18:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:18:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:18:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:18:30,257 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:18:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:18:30,295 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2022-12-14 08:18:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:18:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:18:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:18:30,295 INFO L225 Difference]: With dead ends: 11 [2022-12-14 08:18:30,295 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 08:18:30,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:18:30,297 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:18:30,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:18:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 08:18:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 08:18:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:18:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-12-14 08:18:30,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-12-14 08:18:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:18:30,299 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-12-14 08:18:30,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:18:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-12-14 08:18:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:18:30,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:18:30,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 08:18:30,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:18:30,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:18:30,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:18:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:18:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1933598190, now seen corresponding path program 2 times [2022-12-14 08:18:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:18:30,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491746664] [2022-12-14 08:18:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:18:30,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:18:30,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011150386] [2022-12-14 08:18:30,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:18:30,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:18:30,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:18:30,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:18:30,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:18:41,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:18:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:18:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 08:18:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:18:54,726 WARN L837 $PredicateComparison]: unable to prove that (and (or (and (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (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) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse0 127)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse0)))) (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) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse1 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1))))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2022-12-14 08:20:07,497 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_26| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_gcd_test_~a#1_26|) 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_26|) 0) (= .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_26| .cse0) 256)) (<= .cse1 127) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_26|))))) is different from false [2022-12-14 08:20:26,828 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_26| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_26|) 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_26|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_26| .cse0) 256) 0) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_26|)))) is different from false [2022-12-14 08:20:28,831 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_26| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_26|) 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_26|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_26| .cse0) 256) 0) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_26|)))) is different from true [2022-12-14 08:20:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 08:20:47,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:23,386 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse21 (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)) (.cse29 (mod (+ .cse21 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse28 (mod (+ .cse21 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse20 (mod .cse21 256)) (.cse4 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse16 (= .cse28 0)) (.cse11 (<= .cse28 127)) (.cse13 (<= .cse29 127)) (.cse7 (= .cse29 0)) (.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse9 (not .cse19))) (let ((.cse3 (or .cse7 .cse8 .cse9)) (.cse12 (not .cse13)) (.cse5 (not .cse11)) (.cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse2 (or .cse15 .cse9 .cse16)) (.cse0 (not .cse4)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse22 (<= .cse20 127))) (and (or (let ((.cse6 (= .cse21 0))) (let ((.cse1 (or (and .cse19 (not .cse6)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0)) (= .cse20 0)))) (let ((.cse10 (or .cse0 (and (or .cse6 .cse18 .cse9) .cse1)))) (and (or (and (or (and (or .cse0 (and .cse1 .cse2)) (or (and .cse1 .cse3) .cse4)) .cse5) (or (and (or .cse4 (and (or .cse6 .cse7 .cse8 .cse9) .cse1)) .cse10) .cse11)) .cse12) (or .cse13 (let ((.cse14 (or .cse4 (and (or .cse6 .cse17 .cse9) .cse1)))) (and (or (and .cse14 (or .cse0 (and (or .cse15 .cse6 .cse9 .cse16) .cse1))) .cse5) (or (and .cse14 .cse10) .cse11)))))))) (not .cse22)) (or (let ((.cse26 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse20)) 256) 0)) .cse19))) (let ((.cse24 (or .cse0 (and (or .cse18 .cse9) .cse26))) (.cse25 (or .cse0 (and .cse26 .cse2)))) (and (or (let ((.cse23 (or (and .cse26 .cse3) .cse4))) (and (or (and .cse23 .cse24) .cse11) (or .cse5 (and .cse25 .cse23)))) .cse12) (or (let ((.cse27 (or .cse4 (and (or .cse17 .cse9) .cse26)))) (and (or (and .cse24 .cse27) .cse11) (or (and .cse25 .cse27) .cse5))) .cse13)))) .cse22)))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-12-14 08:22:48,555 WARN L233 SmtUtils]: Spent 50.31s 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) [2022-12-14 08:22:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 08:22:48,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491746664] [2022-12-14 08:22:48,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:22:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011150386] [2022-12-14 08:22:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011150386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:22:48,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122815184] [2022-12-14 08:22:48,558 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 08:22:48,558 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:22:48,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:22:48,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:22:48,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:22:48,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:23:02,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 128)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#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___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_main_~y~0#1|) 1 0)) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:23:02,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:23:02,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:23:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-14 08:23:02,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902535483] [2022-12-14 08:23:02,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:23:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:23:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:23:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:23:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=76, Unknown=14, NotChecked=84, Total=210 [2022-12-14 08:23:02,389 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:24:12,348 WARN L233 SmtUtils]: Spent 57.53s on a formula simplification. DAG size of input: 46 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:24:14,566 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse33 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse1 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse2 (= .cse33 0)) (.cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) (and (<= |c_ULTIMATE.start_main_~x~0#1| 127) (or (not .cse0) (not .cse1) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (or (and .cse2 .cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse3 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse3 127)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse3)))) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse4 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse4 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse4))))) (or (let ((.cse23 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse32 (mod (+ .cse33 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse31 (mod (+ .cse33 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse24 (mod .cse33 256)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse20 (= .cse31 0)) (.cse15 (<= .cse31 127)) (.cse17 (<= .cse32 127)) (.cse11 (= .cse32 0)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse13 (not .cse23))) (let ((.cse8 (or .cse11 .cse12 .cse13)) (.cse16 (not .cse17)) (.cse10 (not .cse15)) (.cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256) 0))) (.cse7 (or .cse19 .cse13 .cse20)) (.cse5 (not .cse9)) (.cse22 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse31)) 256) 0))) (.cse25 (<= .cse24 127))) (and (or (let ((.cse6 (or (and .cse23 (not .cse2)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256) 0)) (= .cse24 0)))) (let ((.cse14 (or .cse5 (and (or .cse2 .cse22 .cse13) .cse6)))) (and (or (and (or (and (or .cse5 (and .cse6 .cse7)) (or (and .cse6 .cse8) .cse9)) .cse10) (or (and (or .cse9 (and (or .cse2 .cse11 .cse12 .cse13) .cse6)) .cse14) .cse15)) .cse16) (or .cse17 (let ((.cse18 (or .cse9 (and (or .cse2 .cse21 .cse13) .cse6)))) (and (or (and .cse18 (or .cse5 (and (or .cse19 .cse2 .cse13 .cse20) .cse6))) .cse10) (or (and .cse18 .cse14) .cse15))))))) (not .cse25)) (or (let ((.cse29 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse24)) 256) 0)) .cse23))) (let ((.cse27 (or .cse5 (and (or .cse22 .cse13) .cse29))) (.cse28 (or .cse5 (and .cse29 .cse7)))) (and (or (let ((.cse26 (or (and .cse29 .cse8) .cse9))) (and (or (and .cse26 .cse27) .cse15) (or .cse10 (and .cse28 .cse26)))) .cse16) (or (let ((.cse30 (or .cse9 (and (or .cse21 .cse13) .cse29)))) (and (or (and .cse27 .cse30) .cse15) (or (and .cse28 .cse30) .cse10))) .cse17)))) .cse25))))) .cse0) (or (not (< |c_ULTIMATE.start_main_~x~0#1| 0)) (not (< 0 |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|) 0)) (let ((.cse36 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse35 (<= .cse36 127))) (and (let ((.cse34 (mod (+ (- 256) .cse36) |c_ULTIMATE.start_main_~y~0#1|))) (or (= .cse34 0) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| (+ (- 256) (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse34) 256))) 256) 0)) .cse35)) (let ((.cse37 (mod (mod .cse36 |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse37) 256) 0)) (not .cse35) (= .cse37 0))))))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_main_~x~0#1| 128)) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from false [2022-12-14 08:24:16,571 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse33 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse1 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse2 (= .cse33 0)) (.cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) (and (<= |c_ULTIMATE.start_main_~x~0#1| 127) (or (not .cse0) (not .cse1) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (or (and .cse2 .cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse3 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse3 127)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse3)))) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse4 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse4 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse4))))) (or (let ((.cse23 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse32 (mod (+ .cse33 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse31 (mod (+ .cse33 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse24 (mod .cse33 256)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse20 (= .cse31 0)) (.cse15 (<= .cse31 127)) (.cse17 (<= .cse32 127)) (.cse11 (= .cse32 0)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse13 (not .cse23))) (let ((.cse8 (or .cse11 .cse12 .cse13)) (.cse16 (not .cse17)) (.cse10 (not .cse15)) (.cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256) 0))) (.cse7 (or .cse19 .cse13 .cse20)) (.cse5 (not .cse9)) (.cse22 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse31)) 256) 0))) (.cse25 (<= .cse24 127))) (and (or (let ((.cse6 (or (and .cse23 (not .cse2)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256) 0)) (= .cse24 0)))) (let ((.cse14 (or .cse5 (and (or .cse2 .cse22 .cse13) .cse6)))) (and (or (and (or (and (or .cse5 (and .cse6 .cse7)) (or (and .cse6 .cse8) .cse9)) .cse10) (or (and (or .cse9 (and (or .cse2 .cse11 .cse12 .cse13) .cse6)) .cse14) .cse15)) .cse16) (or .cse17 (let ((.cse18 (or .cse9 (and (or .cse2 .cse21 .cse13) .cse6)))) (and (or (and .cse18 (or .cse5 (and (or .cse19 .cse2 .cse13 .cse20) .cse6))) .cse10) (or (and .cse18 .cse14) .cse15))))))) (not .cse25)) (or (let ((.cse29 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse24)) 256) 0)) .cse23))) (let ((.cse27 (or .cse5 (and (or .cse22 .cse13) .cse29))) (.cse28 (or .cse5 (and .cse29 .cse7)))) (and (or (let ((.cse26 (or (and .cse29 .cse8) .cse9))) (and (or (and .cse26 .cse27) .cse15) (or .cse10 (and .cse28 .cse26)))) .cse16) (or (let ((.cse30 (or .cse9 (and (or .cse21 .cse13) .cse29)))) (and (or (and .cse27 .cse30) .cse15) (or (and .cse28 .cse30) .cse10))) .cse17)))) .cse25))))) .cse0) (or (not (< |c_ULTIMATE.start_main_~x~0#1| 0)) (not (< 0 |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|) 0)) (let ((.cse36 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse35 (<= .cse36 127))) (and (let ((.cse34 (mod (+ (- 256) .cse36) |c_ULTIMATE.start_main_~y~0#1|))) (or (= .cse34 0) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| (+ (- 256) (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse34) 256))) 256) 0)) .cse35)) (let ((.cse37 (mod (mod .cse36 |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse37) 256) 0)) (not .cse35) (= .cse37 0))))))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_main_~x~0#1| 128)) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from true [2022-12-14 08:24:18,580 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 128))) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256) 0)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse0 127)))) (< 0 |c_ULTIMATE.start_gcd_test_~a#1|)) is different from false [2022-12-14 08:24:20,587 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_26| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_gcd_test_~a#1_26|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_26|) 0) (= .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_26| .cse0) 256)) (<= .cse1 127) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_26|)))))) is different from false [2022-12-14 08:24:22,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:24:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:24:22,597 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-12-14 08:24:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:24:22,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:24:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:24:22,600 INFO L225 Difference]: With dead ends: 12 [2022-12-14 08:24:22,600 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 08:24:22,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 167.5s TimeCoverageRelationStatistics Valid=46, Invalid=92, Unknown=22, NotChecked=182, Total=342 [2022-12-14 08:24:22,601 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:24:22,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 1 Unknown, 21 Unchecked, 2.2s Time] [2022-12-14 08:24:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 08:24:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 08:24:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:24:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-14 08:24:22,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2022-12-14 08:24:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:24:22,605 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-14 08:24:22,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:24:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-14 08:24:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:24:22,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:24:22,605 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-12-14 08:24:22,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:24:22,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:24:22,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:24:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:24:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 187095849, now seen corresponding path program 3 times [2022-12-14 08:24:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:24:22,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242278389] [2022-12-14 08:24:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:24:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:24:22,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:24:22,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711296136] [2022-12-14 08:24:22,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:24:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:24:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:24:22,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:24:22,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5dc0b8d-e14c-4322-9106-e338417f7af3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:24:29,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:24:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:24:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 08:24:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:03,134 WARN L233 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 43 DAG size of output: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:26:04,876 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))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256)) (= (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)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (= .cse0 |c_ULTIMATE.start_gcd_test_~a#1|)))) is different from false [2022-12-14 08:26:56,183 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)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from false [2022-12-14 08:27:19,469 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))) (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)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256) 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|)))) is different from false [2022-12-14 08:27:21,471 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))) (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)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256) 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|)))) is different from true [2022-12-14 08:27:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 08:27:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates...