./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:37:58,722 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:37:58,782 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:37:58,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:37:58,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:37:58,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:37:58,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:37:58,811 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:37:58,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:37:58,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:37:58,813 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:37:58,814 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:37:58,814 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:37:58,815 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:37:58,815 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:37:58,816 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:37:58,816 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:37:58,817 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:37:58,817 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:37:58,818 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:37:58,818 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:37:58,819 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:37:58,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:37:58,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:37:58,821 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:37:58,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:37:58,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:37:58,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:37:58,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:37:58,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:37:58,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:37:58,824 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:37:58,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:37:58,825 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:37:58,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:37:58,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:37:58,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:37:58,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:37:58,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:37:58,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:37:58,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:37:58,826 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:37:58,827 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2023-12-02 12:37:59,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:37:59,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:37:59,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:37:59,048 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:37:59,049 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:37:59,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2023-12-02 12:38:01,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:38:01,991 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:38:01,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2023-12-02 12:38:02,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/data/57229bdbf/282f6598bdb746eda2c20b28f0872ce6/FLAGddc168d8e [2023-12-02 12:38:02,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/data/57229bdbf/282f6598bdb746eda2c20b28f0872ce6 [2023-12-02 12:38:02,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:38:02,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:38:02,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:02,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:38:02,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:38:02,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5f3278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02, skipping insertion in model container [2023-12-02 12:38:02,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,059 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:38:02,214 WARN L240 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_e56baebb-6b1f-4106-9b97-788f787de95e/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2023-12-02 12:38:02,239 WARN L240 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_e56baebb-6b1f-4106-9b97-788f787de95e/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2023-12-02 12:38:02,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:02,250 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:38:02,264 WARN L240 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_e56baebb-6b1f-4106-9b97-788f787de95e/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2023-12-02 12:38:02,275 WARN L240 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_e56baebb-6b1f-4106-9b97-788f787de95e/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2023-12-02 12:38:02,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:02,292 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:38:02,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02 WrapperNode [2023-12-02 12:38:02,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:02,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:02,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:38:02,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:38:02,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,310 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,333 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-12-02 12:38:02,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:02,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:38:02,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:38:02,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:38:02,343 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:38:02,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:38:02,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:38:02,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:38:02,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (1/1) ... [2023-12-02 12:38:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:38:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:02,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:38:02,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:38:02,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:38:02,427 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-12-02 12:38:02,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-12-02 12:38:02,427 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 12:38:02,427 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 12:38:02,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:38:02,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:38:02,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:38:02,505 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:38:02,507 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:38:02,673 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:38:02,736 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:38:02,736 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:38:02,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:02 BoogieIcfgContainer [2023-12-02 12:38:02,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:38:02,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:38:02,742 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:38:02,746 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:38:02,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:38:02" (1/3) ... [2023-12-02 12:38:02,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8a56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:02, skipping insertion in model container [2023-12-02 12:38:02,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:02" (2/3) ... [2023-12-02 12:38:02,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8a56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:02, skipping insertion in model container [2023-12-02 12:38:02,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:02" (3/3) ... [2023-12-02 12:38:02,749 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_6.i [2023-12-02 12:38:02,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:38:02,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 12:38:02,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:38:02,845 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f5bb5d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:38:02,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 12:38:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:38:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:38:02,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:02,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:38:02,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:02,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash -477294563, now seen corresponding path program 1 times [2023-12-02 12:38:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352758021] [2023-12-02 12:38:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:02,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:38:02,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335297202] [2023-12-02 12:38:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:02,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:02,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:02,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:38:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:03,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:38:03,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:03,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:38:03,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352758021] [2023-12-02 12:38:03,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:38:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335297202] [2023-12-02 12:38:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335297202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:03,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:38:03,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279898055] [2023-12-02 12:38:03,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:03,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:03,185 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:03,231 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-12-02 12:38:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 12:38:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:03,240 INFO L225 Difference]: With dead ends: 37 [2023-12-02 12:38:03,240 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 12:38:03,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:03,247 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:03,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:38:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 12:38:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 12:38:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:38:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-02 12:38:03,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-12-02 12:38:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:03,285 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-02 12:38:03,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-02 12:38:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:38:03,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:03,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:03,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:03,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:03,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1913486975, now seen corresponding path program 1 times [2023-12-02 12:38:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:03,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83935553] [2023-12-02 12:38:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:03,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:03,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:38:03,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488186233] [2023-12-02 12:38:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:03,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:03,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:38:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:03,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:38:03,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:03,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:03,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83935553] [2023-12-02 12:38:03,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:38:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488186233] [2023-12-02 12:38:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488186233] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:03,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046264603] [2023-12-02 12:38:03,727 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:38:03,727 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:03,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:03,733 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:03,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:04,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:05,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_main1_~x~0#1| 127) (not (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127))' at error location [2023-12-02 12:38:05,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:05,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:05,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-02 12:38:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248486701] [2023-12-02 12:38:05,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:38:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:38:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:38:05,295 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:05,362 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-12-02 12:38:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:38:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:38:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:05,363 INFO L225 Difference]: With dead ends: 28 [2023-12-02 12:38:05,363 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 12:38:05,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:38:05,366 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:05,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 12:38:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 12:38:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:38:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 12:38:05,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-12-02 12:38:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:05,373 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 12:38:05,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 12:38:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:38:05,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:05,374 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:05,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:38:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 12:38:05,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:05,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 809188509, now seen corresponding path program 2 times [2023-12-02 12:38:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:05,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357750092] [2023-12-02 12:38:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:05,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:05,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:38:05,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581871212] [2023-12-02 12:38:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:38:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:05,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:05,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:38:20,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:38:20,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:38:20,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 12:38:20,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:31,129 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse0 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) .cse0 .cse1) (and .cse0 .cse1 (exists ((v_y_1 Int)) (let ((.cse2 (* 256 v_y_1))) (and (<= 0 (+ .cse2 .cse3 128)) (<= (+ .cse2 .cse3 1) 0) (= (mod (+ .cse2 .cse3) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (exists ((v_y_3 Int)) (let ((.cse4 (* 256 v_y_3))) (and (<= (+ 65281 .cse3 .cse4) 0) (= (mod (+ 65280 .cse3 .cse4) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse3 .cse4))))) (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2023-12-02 12:39:09,974 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256)) (<= (+ .cse0 .cse1 1) 0) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 12:39:34,670 WARN L854 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|)) (.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| .cse2) 256) 0) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) is different from false [2023-12-02 12:39:36,672 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|)) (.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| .cse2) 256) 0) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) is different from true [2023-12-02 12:39:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 12:39:57,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:08,796 WARN L876 $PredicateComparison]: unable to prove that (or (let ((.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse25 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse25))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.cse14 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse27)) 256) 0))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (let ((.cse4 (or .cse14 (and (or .cse15 .cse9) .cse7))) (.cse3 (or (and .cse7 .cse13) .cse14))) (and (or .cse0 (let ((.cse2 (or .cse6 (and .cse7 (or .cse8 .cse9))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse4 .cse2) .cse5)))) (or .cse10 (let ((.cse11 (or (and .cse7 .cse12) .cse6))) (and (or .cse5 (and .cse11 .cse4)) (or (and .cse11 .cse3) .cse1))))))) (< .cse16 128)) (or (< 127 .cse16) (let ((.cse20 (= .cse26 0))) (let ((.cse18 (or (and (<= .cse25 0) (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2023-12-02 12:43:31,065 WARN L876 $PredicateComparison]: unable to prove that (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (and (let ((.cse1 (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (< 127 .cse0) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse1) 256) 0)) (= .cse1 0))) (let ((.cse2 (mod (+ .cse0 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (< .cse0 128) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse2 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) (= .cse2 0))))) (< 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 1)) (< |c_ULTIMATE.start_main1_~y~0#1| 1)) is different from true [2023-12-02 12:44:18,152 WARN L876 $PredicateComparison]: unable to prove that (forall ((v_z_10 Int) (|v_ULTIMATE.start_main1_~y~0#1_17| Int) (v_y_10 Int)) (let ((.cse0 (mod (mod v_z_10 |v_ULTIMATE.start_main1_~y~0#1_17|) 256)) (.cse1 (* v_y_10 256)) (.cse2 (* v_z_10 255))) (or (< v_z_10 0) (< 127 v_z_10) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_17| .cse0) 256) 0)) (= .cse0 0) (< 0 (+ .cse1 .cse2 1)) (not (= (mod (+ .cse1 .cse2) |v_ULTIMATE.start_main1_~y~0#1_17|) 0)) (< (+ .cse1 .cse2 128) 0) (< |v_ULTIMATE.start_main1_~y~0#1_17| 1)))) is different from true [2023-12-02 12:44:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:44:18,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357750092] [2023-12-02 12:44:18,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:44:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581871212] [2023-12-02 12:44:18,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581871212] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761858749] [2023-12-02 12:44:18,155 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:44:18,155 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:18,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:18,156 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:18,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:18,937 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:19,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '308#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_main1_~x~0#1| 127) (not (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127))' at error location [2023-12-02 12:44:19,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:19,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:44:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-12-02 12:44:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286177385] [2023-12-02 12:44:19,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:19,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:44:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:44:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=90, Unknown=8, NotChecked=138, Total=272 [2023-12-02 12:44:19,857 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:54,475 WARN L293 SmtUtils]: Spent 21.40s on a formula simplification. DAG size of input: 46 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:44:56,584 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse29 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (= .cse26 0)) (.cse25 (<= .cse29 0)) (.cse30 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse35 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128))) (and (or (let ((.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse29))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.cse14 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse27)) 256) 0))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (let ((.cse4 (or .cse14 (and (or .cse15 .cse9) .cse7))) (.cse3 (or (and .cse7 .cse13) .cse14))) (and (or .cse0 (let ((.cse2 (or .cse6 (and .cse7 (or .cse8 .cse9))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse4 .cse2) .cse5)))) (or .cse10 (let ((.cse11 (or (and .cse7 .cse12) .cse6))) (and (or .cse5 (and .cse11 .cse4)) (or (and .cse11 .cse3) .cse1))))))) (< .cse16 128)) (or (< 127 .cse16) (let ((.cse18 (or (and .cse25 (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))) .cse30) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (let ((.cse31 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse32 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse34 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and .cse20 .cse31 .cse32) (and .cse31 .cse32 (exists ((v_y_1 Int)) (let ((.cse33 (* 256 v_y_1))) (and (<= 0 (+ .cse33 .cse34 128)) (<= (+ .cse33 .cse34 1) 0) (= (mod (+ .cse33 .cse34) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 .cse35) (exists ((v_y_3 Int)) (let ((.cse36 (* 256 v_y_3))) (and (<= (+ 65281 .cse34 .cse36) 0) (= (mod (+ 65280 .cse34 .cse36) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse34 .cse36))))) .cse25))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not .cse30) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< .cse35 0)) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from false [2023-12-02 12:44:58,591 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse29 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (= .cse26 0)) (.cse25 (<= .cse29 0)) (.cse30 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse35 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128))) (and (or (let ((.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse29))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.cse14 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse27)) 256) 0))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (let ((.cse4 (or .cse14 (and (or .cse15 .cse9) .cse7))) (.cse3 (or (and .cse7 .cse13) .cse14))) (and (or .cse0 (let ((.cse2 (or .cse6 (and .cse7 (or .cse8 .cse9))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse4 .cse2) .cse5)))) (or .cse10 (let ((.cse11 (or (and .cse7 .cse12) .cse6))) (and (or .cse5 (and .cse11 .cse4)) (or (and .cse11 .cse3) .cse1))))))) (< .cse16 128)) (or (< 127 .cse16) (let ((.cse18 (or (and .cse25 (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))) .cse30) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (let ((.cse31 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse32 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse34 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and .cse20 .cse31 .cse32) (and .cse31 .cse32 (exists ((v_y_1 Int)) (let ((.cse33 (* 256 v_y_1))) (and (<= 0 (+ .cse33 .cse34 128)) (<= (+ .cse33 .cse34 1) 0) (= (mod (+ .cse33 .cse34) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 .cse35) (exists ((v_y_3 Int)) (let ((.cse36 (* 256 v_y_3))) (and (<= (+ 65281 .cse34 .cse36) 0) (= (mod (+ 65280 .cse34 .cse36) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse34 .cse36))))) .cse25))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not .cse30) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< .cse35 0)) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from true [2023-12-02 12:45:21,074 WARN L293 SmtUtils]: Spent 21.72s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:23,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 12:45:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 12:45:27,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 12:45:29,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 12:45:31,098 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256)) (<= (+ .cse0 .cse1 1) 0) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 12:45:32,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 12:45:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:33,032 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-12-02 12:45:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:45:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 12:45:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:33,033 INFO L225 Difference]: With dead ends: 29 [2023-12-02 12:45:33,034 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 12:45:33,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=47, Invalid=125, Unknown=16, NotChecked=232, Total=420 [2023-12-02 12:45:33,035 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:33,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 4 Unknown, 153 Unchecked, 10.0s Time] [2023-12-02 12:45:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 12:45:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 12:45:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:45:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-12-02 12:45:33,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2023-12-02 12:45:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:33,043 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-12-02 12:45:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-12-02 12:45:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:45:33,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:33,044 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:33,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:45:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:33,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:45:33,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -687217407, now seen corresponding path program 3 times [2023-12-02 12:45:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426672758] [2023-12-02 12:45:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:33,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:45:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27441928] [2023-12-02 12:45:33,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:45:33,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:33,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:33,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:33,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56baebb-6b1f-4106-9b97-788f787de95e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:45:35,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:45:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:35,760 WARN L260 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 12:45:35,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:37,921 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse0 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) (or (and (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0) (exists ((v_y_11 Int)) (let ((.cse1 (* v_y_11 256))) (and (<= 0 (+ 65408 .cse0 .cse1)) (= (mod (+ 65280 .cse0 .cse1) |c_ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ 65281 .cse0 .cse1) 0))))) (and .cse2 (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (exists ((v_y_13 Int)) (let ((.cse3 (* v_y_13 256))) (and (<= 0 (+ .cse0 128 .cse3)) (<= (+ .cse0 .cse3 1) 0) (= (mod (+ .cse0 .cse3) |c_ULTIMATE.start_main1_~y~0#1|) 0)))) .cse2))) (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2023-12-02 12:46:03,437 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256)) (.cse0 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse1 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= 0 (mod (+ .cse0 .cse1) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse2) (<= 0 (+ .cse0 128 .cse1))))) (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from false [2023-12-02 12:49:28,163 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (let ((.cse2 (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse22 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse21 (mod .cse22 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse20 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= 0 (mod (+ .cse19 .cse20) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse19 .cse20 1) 0) (= (mod .cse21 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse22 0)) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 128 (mod (+ .cse10 .cse21) 256)) (<= 0 (+ .cse19 128 .cse20))))))) (.cse3 (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse18 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse15 (mod .cse18 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse17 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (<= (mod (+ .cse10 .cse15) 256) 127) (= 0 (mod (+ .cse16 .cse17) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse16 .cse17 1) 0) (= (mod .cse15 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse18 0)) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse15) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse16 128 .cse17))))))) (.cse0 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse14 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse11 (mod .cse14 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse12 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse13 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (<= (mod (+ .cse10 .cse11) 256) 127) (= 0 (mod (+ .cse12 .cse13) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse12 .cse13 1) 0) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse11) 256) 127) (= (mod .cse11 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse14 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse12 128 .cse13))))))) (.cse4 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse1 (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse9 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse8 (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse6 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse7 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= 0 (mod (+ .cse6 .cse7) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse6 .cse7 1) 0) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse8) 256) 127) (= (mod .cse8 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse9 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 128 (mod (+ .cse10 .cse8) 256)) (<= 0 (+ .cse6 128 .cse7)))))))) (or (and .cse0 .cse1) (and .cse2 .cse0) (and .cse3 .cse4) (and .cse2 .cse4) (and .cse3 .cse0) (and .cse0 .cse5) (and .cse4 .cse5) (and .cse4 .cse1)))) (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 12:50:57,123 WARN L854 $PredicateComparison]: unable to prove that (and (or (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= (+ |ULTIMATE.start_gcd_test_#res#1| 1) 0) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse2 (* v_y_13 256))) (and (not (= .cse0 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse1 .cse2) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse1 .cse2 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse0 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse1 128 .cse2))))))) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |ULTIMATE.start_gcd_test_#res#1| 127) (<= 0 |ULTIMATE.start_gcd_test_#res#1|) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse3 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse4 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse5 (* v_y_13 256))) (and (not (= .cse3 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse4 .cse5) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse4 .cse5 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse3 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse4 128 .cse5))))) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) is different from false [2023-12-02 12:51:41,968 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= (+ |ULTIMATE.start_gcd_test_#res#1| 1) 0) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse2 (* v_y_13 256))) (and (not (= .cse0 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse1 .cse2) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse1 .cse2 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse0 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse1 128 .cse2))))))) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |ULTIMATE.start_gcd_test_#res#1| 127) (<= 0 |ULTIMATE.start_gcd_test_#res#1|) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse3 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse4 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse5 (* v_y_13 256))) (and (not (= .cse3 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse4 .cse5) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse4 .cse5 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse3 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse4 128 .cse5))))) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) is different from false [2023-12-02 12:51:43,973 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= (+ |ULTIMATE.start_gcd_test_#res#1| 1) 0) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse2 (* v_y_13 256))) (and (not (= .cse0 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse1 .cse2) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse1 .cse2 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse0 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse1 128 .cse2))))))) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |ULTIMATE.start_gcd_test_#res#1| 127) (<= 0 |ULTIMATE.start_gcd_test_#res#1|) (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse3 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |ULTIMATE.start_main1_~y~0#1|) 256)) (.cse4 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse5 (* v_y_13 256))) (and (not (= .cse3 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse4 .cse5) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse4 .cse5 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= (mod (mod .cse3 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse4 128 .cse5))))) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) is different from true [2023-12-02 12:51:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 12:51:43,974 INFO L327 TraceCheckSpWp]: Computing backward predicates...