./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS --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 fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- 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-8393723 [2022-11-19 06:40:43,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:40:43,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:40:43,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:40:43,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:40:43,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:40:43,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:40:43,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:40:43,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:40:43,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:40:43,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:40:43,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:40:43,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:40:43,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:40:43,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:40:43,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:40:43,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:40:43,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:40:43,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:40:43,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:40:43,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:40:43,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:40:43,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:40:43,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:40:43,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:40:43,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:40:43,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:40:43,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:40:43,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:40:43,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:40:43,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:40:43,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:40:43,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:40:43,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:40:43,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:40:43,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:40:43,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:40:43,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:40:43,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:40:43,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:40:43,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:40:43,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:40:43,628 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:40:43,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:40:43,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:40:43,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:40:43,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:40:43,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:40:43,631 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:40:43,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:40:43,631 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:40:43,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:40:43,632 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:40:43,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:40:43,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:40:43,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:40:43,633 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:40:43,633 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:40:43,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:40:43,634 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:40:43,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:40:43,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:40:43,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:40:43,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:40:43,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:40:43,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:40:43,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:40:43,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:40:43,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:40:43,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:40:43,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:40:43,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:40:43,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:40:43,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:40:43,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:40:43,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:40:43,639 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:40:43,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:40:43,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:40:43,640 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:40:43,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:40:43,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:40:43,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:40:43,641 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2022-11-19 06:40:43,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:40:44,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:40:44,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:40:44,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:40:44,016 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:40:44,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-19 06:40:44,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/data/a31c07876/f19e3925047e455e864e03e86561b4b9/FLAG63936ca37 [2022-11-19 06:40:44,740 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:40:44,741 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-19 06:40:44,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/data/a31c07876/f19e3925047e455e864e03e86561b4b9/FLAG63936ca37 [2022-11-19 06:40:45,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/data/a31c07876/f19e3925047e455e864e03e86561b4b9 [2022-11-19 06:40:45,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:40:45,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:40:45,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:40:45,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:40:45,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:40:45,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de35098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45, skipping insertion in model container [2022-11-19 06:40:45,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:40:45,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:40:45,355 WARN L234 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-19 06:40:45,386 WARN L234 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-19 06:40:45,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:40:45,397 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:40:45,414 WARN L234 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-19 06:40:45,426 WARN L234 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_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-19 06:40:45,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:40:45,445 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:40:45,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45 WrapperNode [2022-11-19 06:40:45,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:40:45,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:40:45,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:40:45,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:40:45,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,493 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-19 06:40:45,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:40:45,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:40:45,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:40:45,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:40:45,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,525 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:40:45,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:40:45,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:40:45,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:40:45,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (1/1) ... [2022-11-19 06:40:45,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:40:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:45,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:40:45,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:40:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:40:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 06:40:45,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 06:40:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 06:40:45,615 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 06:40:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:40:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:40:45,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:40:45,708 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:40:45,710 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:40:45,978 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:40:46,114 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:40:46,115 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:40:46,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:40:46 BoogieIcfgContainer [2022-11-19 06:40:46,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:40:46,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:40:46,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:40:46,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:40:46,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:40:45" (1/3) ... [2022-11-19 06:40:46,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c76f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:40:46, skipping insertion in model container [2022-11-19 06:40:46,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:45" (2/3) ... [2022-11-19 06:40:46,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c76f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:40:46, skipping insertion in model container [2022-11-19 06:40:46,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:40:46" (3/3) ... [2022-11-19 06:40:46,147 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2022-11-19 06:40:46,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:40:46,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:40:46,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:40:46,296 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;@8afb553, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:40:46,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:40:46,302 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) [2022-11-19 06:40:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:40:46,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:46,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:40:46,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2022-11-19 06:40:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:46,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572027347] [2022-11-19 06:40:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:46,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:46,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:46,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868555567] [2022-11-19 06:40:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:46,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:46,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:40:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:40:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:46,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:40:46,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572027347] [2022-11-19 06:40:46,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868555567] [2022-11-19 06:40:46,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868555567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:46,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:46,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:40:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963484943] [2022-11-19 06:40:46,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:46,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:40:46,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:40:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:46,979 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) [2022-11-19 06:40:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:47,061 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-19 06:40:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:40:47,064 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 [2022-11-19 06:40:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:47,073 INFO L225 Difference]: With dead ends: 37 [2022-11-19 06:40:47,074 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 06:40:47,077 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 [2022-11-19 06:40:47,081 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-19 06:40:47,082 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] [2022-11-19 06:40:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 06:40:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 06:40:47,124 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) [2022-11-19 06:40:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-19 06:40:47,127 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2022-11-19 06:40:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:47,128 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-19 06:40:47,128 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) [2022-11-19 06:40:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-19 06:40:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:40:47,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:47,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:47,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:40:47,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2022-11-19 06:40:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494223323] [2022-11-19 06:40:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:47,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446822737] [2022-11-19 06:40:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:47,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:47,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:47,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:40:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:40:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:47,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:47,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494223323] [2022-11-19 06:40:47,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446822737] [2022-11-19 06:40:47,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446822737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840184383] [2022-11-19 06:40:47,709 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:47,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:47,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:47,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:47,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:48,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:48,655 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 [2022-11-19 06:40:48,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:48,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:48,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-19 06:40:48,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919031923] [2022-11-19 06:40:48,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:40:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:40:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:40:48,659 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) [2022-11-19 06:40:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:48,790 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-19 06:40:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:40:48,792 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 [2022-11-19 06:40:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:48,794 INFO L225 Difference]: With dead ends: 28 [2022-11-19 06:40:48,794 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 06:40:48,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:40:48,800 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-19 06:40:48,804 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] [2022-11-19 06:40:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 06:40:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 06:40:48,815 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) [2022-11-19 06:40:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-19 06:40:48,818 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2022-11-19 06:40:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:48,819 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-19 06:40:48,819 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) [2022-11-19 06:40:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-19 06:40:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:40:48,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:48,821 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:48,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 06:40:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:49,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2022-11-19 06:40:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:49,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105863024] [2022-11-19 06:40:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:49,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633026106] [2022-11-19 06:40:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:40:49,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:49,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:49,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:41:05,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:41:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:41:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 06:41:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:27,626 WARN L233 SmtUtils]: Spent 5.39s 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) [2022-11-19 06:41:40,933 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse0 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= .cse0 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse0 256)) (not (<= .cse1 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_25| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_25| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_25|) (<= |v_ULTIMATE.start_gcd_test_~a#1_25| 127) (= .cse2 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse2 256))))) (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) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse3 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse3 |c_ULTIMATE.start_main1_~y~0#1|) 256))))) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse5 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse4 (mod .cse5 |c_ULTIMATE.start_main1_~y~0#1|))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= .cse4 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse5 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)))))))) is different from false [2022-11-19 06:41:53,905 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 [2022-11-19 06:42:25,542 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 [2022-11-19 06:42:46,843 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 [2022-11-19 06:42:48,848 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 [2022-11-19 06:42:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-19 06:42:48,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:47:50,455 WARN L233 SmtUtils]: Spent 3.55m on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:24,148 WARN L859 $PredicateComparison]: unable to prove that (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 ((.cse3 (<= .cse2 127))) (and (or (let ((.cse1 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse0 (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)))) (and (or .cse0 (= .cse1 0)) (or .cse0 (<= (mod .cse1 256) 127))))) .cse3) (let ((.cse4 (mod (mod .cse2 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse3) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) is different from true [2022-11-19 06:49:15,439 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 ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256) |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|) (< (+ 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 [2022-11-19 06:49:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:49:15,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105863024] [2022-11-19 06:49:15,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633026106] [2022-11-19 06:49:15,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633026106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929524342] [2022-11-19 06:49:15,444 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:49:15,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:15,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:15,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:15,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:49:15,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:49:24,931 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 [2022-11-19 06:49:24,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:49:24,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:49:24,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-19 06:49:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960412474] [2022-11-19 06:49:24,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:49:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:49:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:49:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=122, Unknown=10, NotChecked=162, Total=342 [2022-11-19 06:49:24,935 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) [2022-11-19 06:49:26,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 06:49:28,244 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 ((.cse3 (<= .cse2 127))) (and (or (let ((.cse1 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse0 (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)))) (and (or .cse0 (= .cse1 0)) (or .cse0 (<= (mod .cse1 256) 127))))) .cse3) (let ((.cse4 (mod (mod .cse2 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse3) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0)))) is different from true [2022-11-19 06:49:30,253 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 [2022-11-19 06:49:32,263 WARN L859 $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 true [2022-11-19 06:49:34,273 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (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) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse0 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= .cse0 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse0 256)) (not (<= .cse1 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_25| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_25| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_25|) (<= |v_ULTIMATE.start_gcd_test_~a#1_25| 127) (= .cse2 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse2 256))))) (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) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse3 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse3 |c_ULTIMATE.start_main1_~y~0#1|) 256))))) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse5 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (let ((.cse4 (mod .cse5 |c_ULTIMATE.start_main1_~y~0#1|))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= .cse4 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse5 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)))))))) is different from false [2022-11-19 06:49:35,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:49:37,326 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))))) is different from false [2022-11-19 06:49:38,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:49:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:38,616 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-19 06:49:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:49:38,617 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 [2022-11-19 06:49:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:38,618 INFO L225 Difference]: With dead ends: 29 [2022-11-19 06:49:38,618 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 06:49:38,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 260.7s TimeCoverageRelationStatistics Valid=56, Invalid=125, Unknown=15, NotChecked=310, Total=506 [2022-11-19 06:49:38,620 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:38,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 90 Unchecked, 3.6s Time] [2022-11-19 06:49:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 06:49:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 06:49:38,630 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) [2022-11-19 06:49:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-19 06:49:38,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-11-19 06:49:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:38,632 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-19 06:49:38,632 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) [2022-11-19 06:49:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-19 06:49:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:49:38,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:38,634 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:38,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:38,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:38,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1814613500, now seen corresponding path program 3 times [2022-11-19 06:49:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552513289] [2022-11-19 06:49:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:38,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:38,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:38,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151556683] [2022-11-19 06:49:38,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:49:38,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:38,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:38,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a9be32-6a8c-4cdb-a51b-f7f143175d8c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:49:48,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:49:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:49:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:49:48,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:25,211 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 [2022-11-19 06:52:05,234 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 [2022-11-19 06:52:31,059 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 [2022-11-19 06:52:33,064 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 [2022-11-19 06:52:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-19 06:52:56,039 INFO L328 TraceCheckSpWp]: Computing backward predicates...