./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf --- 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-e04fb08 [2022-11-16 12:31:19,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:31:19,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:31:19,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:31:19,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:31:19,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:31:19,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:31:19,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:31:19,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:31:19,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:31:19,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:31:19,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:31:19,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:31:19,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:31:19,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:31:19,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:31:19,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:31:19,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:31:19,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:31:19,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:31:19,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:31:19,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:31:19,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:31:19,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:31:19,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:31:19,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:31:19,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:31:19,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:31:19,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:31:19,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:31:19,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:31:19,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:31:19,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:31:19,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:31:19,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:31:19,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:31:19,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:31:19,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:31:19,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:31:19,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:31:19,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:31:19,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:31:19,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:31:19,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:31:19,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:31:19,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:31:19,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:31:19,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:31:19,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:31:19,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:31:19,565 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:31:19,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:31:19,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:31:19,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:31:19,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:31:19,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:31:19,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:31:19,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:31:19,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:31:19,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:31:19,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:31:19,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:31:19,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:31:19,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:31:19,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:31:19,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:31:19,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:31:19,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:31:19,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:31:19,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:31:19,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:31:19,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:31:19,573 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:31:19,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:31:19,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:31:19,574 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf [2022-11-16 12:31:19,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:31:19,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:31:19,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:31:19,984 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:31:19,985 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:31:19,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2022-11-16 12:31:20,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/data/2a611f898/13424070f7b547d2af8d7a4b35feb235/FLAGff0e57d1f [2022-11-16 12:31:20,613 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:31:20,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2022-11-16 12:31:20,625 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/data/2a611f898/13424070f7b547d2af8d7a4b35feb235/FLAGff0e57d1f [2022-11-16 12:31:20,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/data/2a611f898/13424070f7b547d2af8d7a4b35feb235 [2022-11-16 12:31:20,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:31:20,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:31:20,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:20,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:31:20,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:31:20,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:20" (1/1) ... [2022-11-16 12:31:21,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d6d918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21, skipping insertion in model container [2022-11-16 12:31:21,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:20" (1/1) ... [2022-11-16 12:31:21,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:31:21,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:31:21,278 WARN L229 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2022-11-16 12:31:21,303 WARN L229 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2022-11-16 12:31:21,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:21,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:31:21,329 WARN L229 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2022-11-16 12:31:21,340 WARN L229 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_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2022-11-16 12:31:21,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:21,357 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:31:21,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21 WrapperNode [2022-11-16 12:31:21,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:21,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:31:21,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:31:21,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:31:21,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,400 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-16 12:31:21,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:31:21,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:31:21,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:31:21,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:31:21,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:31:21,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:31:21,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:31:21,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:31:21,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (1/1) ... [2022-11-16 12:31:21,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:31:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:21,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:31:21,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:31:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:31:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-16 12:31:21,536 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-16 12:31:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-16 12:31:21,539 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-16 12:31:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:31:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:31:21,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:31:21,654 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:31:21,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:31:21,952 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:31:21,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:31:21,959 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:31:21,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:31:21 BoogieIcfgContainer [2022-11-16 12:31:21,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:31:21,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:31:21,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:31:21,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:31:21,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:31:20" (1/3) ... [2022-11-16 12:31:21,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d56852a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:31:21, skipping insertion in model container [2022-11-16 12:31:21,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:21" (2/3) ... [2022-11-16 12:31:21,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d56852a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:31:21, skipping insertion in model container [2022-11-16 12:31:21,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:31:21" (3/3) ... [2022-11-16 12:31:21,972 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_1.i [2022-11-16 12:31:22,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:31:22,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:31:22,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:31:22,132 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=PETRI_NET, 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;@16172e40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:31:22,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:31:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) [2022-11-16 12:31:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:31:22,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:22,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:22,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:31:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-16 12:31:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100536089] [2022-11-16 12:31:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:22,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:31:22,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008572837] [2022-11-16 12:31:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:22,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:22,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:22,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:31:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:31:22,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:22,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:31:22,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:22,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100536089] [2022-11-16 12:31:22,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:31:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008572837] [2022-11-16 12:31:22,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008572837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:31:22,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:31:22,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:31:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060668671] [2022-11-16 12:31:22,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:31:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:31:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:31:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:31:22,563 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-16 12:31:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:22,601 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-16 12:31:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:31:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 11 [2022-11-16 12:31:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:22,613 INFO L225 Difference]: With dead ends: 72 [2022-11-16 12:31:22,619 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 12:31:22,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:31:22,630 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:22,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:31:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 12:31:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 12:31:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-11-16 12:31:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-16 12:31:22,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2022-11-16 12:31:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:22,703 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-16 12:31:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-16 12:31:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-16 12:31:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:31:22,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:22,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:22,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 12:31:22,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:31:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-16 12:31:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:22,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542891905] [2022-11-16 12:31:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:22,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:22,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:31:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217159761] [2022-11-16 12:31:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:22,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:22,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:31:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:23,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:31:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:23,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:31:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542891905] [2022-11-16 12:31:23,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:31:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217159761] [2022-11-16 12:31:23,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217159761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:31:23,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:31:23,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:31:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945404686] [2022-11-16 12:31:23,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:31:23,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:31:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:31:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:31:23,123 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 12:31:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:23,141 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-16 12:31:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:31:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2022-11-16 12:31:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:23,143 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:31:23,143 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:31:23,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:31:23,145 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:31:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:31:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 12:31:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2022-11-16 12:31:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-16 12:31:23,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-16 12:31:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:23,154 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-16 12:31:23,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 12:31:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-16 12:31:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:31:23,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:23,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:23,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:31:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-16 12:31:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091295872] [2022-11-16 12:31:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:23,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:31:23,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157217169] [2022-11-16 12:31:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:23,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:23,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:23,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:31:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:31:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:23,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:23,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091295872] [2022-11-16 12:31:23,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:31:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157217169] [2022-11-16 12:31:23,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157217169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:23,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:23,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-16 12:31:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803307826] [2022-11-16 12:31:23,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:31:23,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:31:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:31:23,694 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-16 12:31:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:23,774 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-16 12:31:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:31:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 12 [2022-11-16 12:31:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:23,776 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:31:23,776 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 12:31:23,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:31:23,778 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:23,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:31:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 12:31:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-16 12:31:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-11-16 12:31:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-16 12:31:23,786 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-16 12:31:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:23,787 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-16 12:31:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-16 12:31:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-16 12:31:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:31:23,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:23,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:23,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:23,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:23,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:31:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-16 12:31:23,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:23,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24299442] [2022-11-16 12:31:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:23,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:24,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:31:24,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350059895] [2022-11-16 12:31:24,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:31:24,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:24,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:24,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:31:35,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:31:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:31:35,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:31:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:26,465 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-16 12:32:48,309 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-16 12:33:10,502 WARN L833 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-16 12:33:29,582 WARN L833 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-16 12:33:31,588 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2022-11-16 12:33:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 12:33:49,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:01,118 WARN L233 SmtUtils]: Spent 3.12m on a formula simplification that was a NOOP. DAG size: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:39:06,359 WARN L233 SmtUtils]: Spent 45.76s on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:39:45,807 WARN L855 $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 ((.cse1 (<= .cse2 127))) (and (let ((.cse0 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse0 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse1 (= .cse0 0))) (let ((.cse3 (mod (mod .cse2 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse3) 256) 0)) (= .cse3 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) is different from true [2022-11-16 12:40:35,693 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2022-11-16 12:40:37,694 WARN L855 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2022-11-16 12:40:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24299442] [2022-11-16 12:40:56,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:40:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350059895] [2022-11-16 12:40:56,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350059895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:56,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:56,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-16 12:40:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225125118] [2022-11-16 12:40:56,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:40:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:40:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=118, Unknown=19, NotChecked=162, Total=342 [2022-11-16 12:40:56,227 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-16 12:41:50,261 WARN L233 SmtUtils]: Spent 43.92s on a formula simplification. DAG size of input: 45 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:41:52,635 WARN L855 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from true [2022-11-16 12:41:54,643 WARN L833 $PredicateComparison]: unable to prove that (and (or (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ .cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse1 (<= .cse13 127)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse8 (mod .cse12 256))) (let ((.cse0 (<= .cse8 127)) (.cse2 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse13)) 256) 0))) (.cse5 (= .cse13 0)) (.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 0))) (.cse3 (not .cse9)) (.cse7 (not .cse1))) (and (or .cse0 (let ((.cse4 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse8)) 256) 0)) .cse9))) (and (or .cse1 (and (or .cse2 .cse3) .cse4)) (or (and .cse4 (or .cse5 .cse6 .cse3)) .cse7)))) (or (not .cse0) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (= .cse8 0))) (.cse10 (= .cse12 0))) (and (or (and (or .cse10 .cse2 .cse3) .cse11) .cse1) (or (and .cse11 (or .cse10 .cse5 .cse6 .cse3)) .cse7))))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse14 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse14 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse14) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse15 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse15) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from false [2022-11-16 12:41:57,067 WARN L855 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse30 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse30 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse30) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse31 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse31 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse31) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from true [2022-11-16 12:41:59,076 WARN L833 $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)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse0 127) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (let ((.cse1 (mod (+ (- 256) .cse2) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse1 0) (not (<= .cse2 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) (< 0 |c_ULTIMATE.start_gcd_test_~a#1|)) is different from false [2022-11-16 12:42:01,083 WARN L833 $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 ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-16 12:42:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:01,506 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-16 12:42:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:42:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 13 [2022-11-16 12:42:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:01,508 INFO L225 Difference]: With dead ends: 43 [2022-11-16 12:42:01,508 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 12:42:01,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 368.1s TimeCoverageRelationStatistics Valid=56, Invalid=145, Unknown=25, NotChecked=374, Total=600 [2022-11-16 12:42:01,509 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:01,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 377 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-11-16 12:42:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 12:42:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-16 12:42:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 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) [2022-11-16 12:42:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-16 12:42:01,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-16 12:42:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:01,519 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-16 12:42:01,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-16 12:42:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-16 12:42:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:42:01,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:01,520 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:01,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:01,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2022-11-16 12:42:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:01,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091875968] [2022-11-16 12:42:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:01,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:42:01,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736375934] [2022-11-16 12:42:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:01,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:01,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:42:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:42:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:02,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:41,440 WARN L833 $PredicateComparison]: unable to prove that (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse29 127)) (.cse3 (<= .cse28 127)) (.cse22 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse28) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse24 (= .cse28 0)) (.cse25 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse29) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse26 (= .cse29 0)) (.cse12 (not .cse16)) (.cse17 (mod .cse27 256))) (let ((.cse18 (<= .cse17 127)) (.cse11 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse29)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse6 (or .cse25 .cse26 .cse12)) (.cse14 (or .cse22 .cse12 .cse24)) (.cse0 (not .cse3)) (.cse8 (not .cse9)) (.cse13 (not .cse5)) (.cse15 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse28)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|))))) (and (or (let ((.cse7 (or .cse16 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse17)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))))) (let ((.cse4 (or (and .cse7 (or .cse15 .cse12)) .cse13)) (.cse2 (or .cse13 (and .cse14 .cse7)))) (and (or (let ((.cse1 (or .cse5 (and .cse6 .cse7)))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse1)))) .cse8) (or .cse9 (let ((.cse10 (or .cse5 (and (or .cse11 .cse12) .cse7)))) (and (or (and .cse4 .cse10) .cse3) (or .cse0 (and .cse10 .cse2)))))))) .cse18) (or (not .cse18) (let ((.cse21 (or .cse16 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse17) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|))) (= .cse17 0))) (.cse23 (= .cse27 0))) (let ((.cse20 (or .cse13 (and .cse21 (or .cse23 .cse15 .cse12))))) (and (or (let ((.cse19 (or .cse5 (and .cse21 (or .cse23 .cse11 .cse12))))) (and (or .cse3 (and .cse19 .cse20)) (or .cse0 (and (or (and .cse21 (or .cse22 .cse23 .cse12 .cse24)) .cse13) .cse19)))) .cse9) (or (and (or (and .cse20 (or .cse5 (and (or .cse23 .cse25 .cse26 .cse12) .cse21))) .cse3) (or (and (or (and .cse6 .cse21) .cse5) (or .cse13 (and .cse21 .cse14))) .cse0)) .cse8)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-16 12:44:07,654 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 62 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:44:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 12:44:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091875968] [2022-11-16 12:44:07,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:44:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736375934] [2022-11-16 12:44:07,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736375934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:07,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:07,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-11-16 12:44:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588764823] [2022-11-16 12:44:07,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:07,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:44:07,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:44:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=37, Unknown=1, NotChecked=12, Total=72 [2022-11-16 12:44:07,683 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-16 12:44:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:08,194 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-11-16 12:44:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:44:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 13 [2022-11-16 12:44:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:08,196 INFO L225 Difference]: With dead ends: 44 [2022-11-16 12:44:08,196 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 12:44:08,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=22, Invalid=37, Unknown=1, NotChecked=12, Total=72 [2022-11-16 12:44:08,197 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:08,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 176 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-11-16 12:44:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 12:44:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-16 12:44:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-11-16 12:44:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-16 12:44:08,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2022-11-16 12:44:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:08,207 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-16 12:44:08,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-16 12:44:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-16 12:44:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:44:08,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:08,208 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:08,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:08,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 66034544, now seen corresponding path program 3 times [2022-11-16 12:44:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:08,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099295791] [2022-11-16 12:44:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:08,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:44:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230911233] [2022-11-16 12:44:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:08,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:08,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:08,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:08,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23119d4f-2120-4d6d-80b3-c39f93cfe8bc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:44:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:44:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:23,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:44:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:00,702 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (and (not (= .cse0 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_23|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_23| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (< |v_ULTIMATE.start_gcd_test_~a#1_23| 0) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) |c_ULTIMATE.start_gcd_test_~b#1|)))) (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) is different from false [2022-11-16 12:45:32,117 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256))) (and (not (= .cse0 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_23|)) (not (= .cse1 0)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_23| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 .cse1) 256)) (= .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_23| 0))))) (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) is different from false [2022-11-16 12:45:55,090 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256))) (and (not (= .cse0 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_23|)) (= (mod (mod .cse0 .cse1) 256) 0) (not (= .cse1 0)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_23| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_23| 0))))) (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) is different from false [2022-11-16 12:46:17,676 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256))) (and (not (= .cse0 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_23|)) (= (mod (mod .cse0 .cse1) 256) 0) (not (= .cse1 0)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_23| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= .cse1 |c_ULTIMATE.start_gcd_test_#res#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_23| 0))))) (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) is different from false