./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX --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 8b88d28a7728931631f575ad9d71defb220443a8a6fd9744c7c34a892b41cf0b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:43:08,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:43:08,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:43:08,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:43:08,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:43:08,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:43:08,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:43:08,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:43:08,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:43:08,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:43:08,939 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:43:08,940 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:43:08,940 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:43:08,941 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:43:08,942 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:43:08,942 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:43:08,943 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:43:08,943 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:43:08,944 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:43:08,944 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:43:08,945 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:43:08,953 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:43:08,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:43:08,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:43:08,954 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:43:08,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:43:08,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:43:08,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:43:08,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:43:08,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:43:08,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:43:08,957 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:43:08,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:43:08,958 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:43:08,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:43:08,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:43:08,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:43:08,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:43:08,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:43:08,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:43:08,959 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:43:08,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:43:08,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:43:08,960 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:43:08,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:43:08,961 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_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b88d28a7728931631f575ad9d71defb220443a8a6fd9744c7c34a892b41cf0b [2023-11-12 00:43:09,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:43:09,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:43:09,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:43:09,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:43:09,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:43:09,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/gcd_1+newton_3_5.i [2023-11-12 00:43:12,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:43:12,672 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:43:12,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/sv-benchmarks/c/combinations/gcd_1+newton_3_5.i [2023-11-12 00:43:12,684 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/data/cf88d6626/d3b9e1ae71bd444c991773acfff9439e/FLAG8e79987e4 [2023-11-12 00:43:12,699 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/data/cf88d6626/d3b9e1ae71bd444c991773acfff9439e [2023-11-12 00:43:12,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:43:12,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:43:12,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:12,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:43:12,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:43:12,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:12,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345549f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12, skipping insertion in model container [2023-11-12 00:43:12,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:12,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:43:12,892 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_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/sv-benchmarks/c/combinations/gcd_1+newton_3_5.i[1226,1239] [2023-11-12 00:43:12,919 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_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/sv-benchmarks/c/combinations/gcd_1+newton_3_5.i[2828,2841] [2023-11-12 00:43:12,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:12,932 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:43:12,943 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_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/sv-benchmarks/c/combinations/gcd_1+newton_3_5.i[1226,1239] [2023-11-12 00:43:12,955 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_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/sv-benchmarks/c/combinations/gcd_1+newton_3_5.i[2828,2841] [2023-11-12 00:43:12,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:12,973 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:43:12,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12 WrapperNode [2023-11-12 00:43:12,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:12,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:12,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:43:12,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:43:12,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:12,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,016 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-11-12 00:43:13,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:13,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:43:13,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:43:13,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:43:13,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,043 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:43:13,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:43:13,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:43:13,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:43:13,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (1/1) ... [2023-11-12 00:43:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:43:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:13,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:43:13,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:43:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:43:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-12 00:43:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-12 00:43:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-12 00:43:13,139 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-12 00:43:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:43:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:43:13,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:43:13,240 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:43:13,242 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:43:13,614 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:43:13,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:43:13,682 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:43:13,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:13 BoogieIcfgContainer [2023-11-12 00:43:13,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:43:13,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:43:13,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:43:13,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:43:13,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:43:12" (1/3) ... [2023-11-12 00:43:13,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d948ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:13, skipping insertion in model container [2023-11-12 00:43:13,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:12" (2/3) ... [2023-11-12 00:43:13,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d948ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:13, skipping insertion in model container [2023-11-12 00:43:13,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:13" (3/3) ... [2023-11-12 00:43:13,703 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_5.i [2023-11-12 00:43:13,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:43:13,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:43:13,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:43:13,803 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;@792091ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:43:13,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:43:13,808 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) [2023-11-12 00:43:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:43:13,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:13,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:43:13,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:13,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2023-11-12 00:43:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:13,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654416897] [2023-11-12 00:43:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:13,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:43:13,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723179207] [2023-11-12 00:43:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:13,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:14,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:43:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:14,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:43:14,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:14,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:43:14,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654416897] [2023-11-12 00:43:14,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:43:14,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723179207] [2023-11-12 00:43:14,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723179207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:43:14,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:43:14,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:43:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211947273] [2023-11-12 00:43:14,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:43:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:43:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:43:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:43:14,247 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) [2023-11-12 00:43:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:14,297 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-11-12 00:43:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:43:14,299 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 [2023-11-12 00:43:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:14,307 INFO L225 Difference]: With dead ends: 37 [2023-11-12 00:43:14,307 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:43:14,310 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 [2023-11-12 00:43:14,315 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 [2023-11-12 00:43:14,316 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] [2023-11-12 00:43:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:43:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 00:43:14,354 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) [2023-11-12 00:43:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-12 00:43:14,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-11-12 00:43:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-12 00:43:14,358 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) [2023-11-12 00:43:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-12 00:43:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:43:14,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:14,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:14,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:43:14,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:43:14,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:14,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2023-11-12 00:43:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46630484] [2023-11-12 00:43:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:14,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:43:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581165848] [2023-11-12 00:43:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:14,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:14,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:14,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:43:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:14,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:43:14,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:14,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:14,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46630484] [2023-11-12 00:43:14,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:43:14,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581165848] [2023-11-12 00:43:14,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581165848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:14,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612471167] [2023-11-12 00:43:14,843 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:43:14,843 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:14,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:14,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:14,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:17,477 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:17,927 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 [2023-11-12 00:43:17,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:17,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:43:17,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:43:17,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592481112] [2023-11-12 00:43:17,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:17,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:43:17,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:43:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:43:17,935 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) [2023-11-12 00:43:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:18,025 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-12 00:43:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:43:18,026 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 [2023-11-12 00:43:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:18,027 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:43:18,027 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:43:18,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:43:18,029 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-12 00:43:18,030 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] [2023-11-12 00:43:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:43:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 00:43:18,036 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) [2023-11-12 00:43:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-12 00:43:18,037 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-11-12 00:43:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:18,037 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-12 00:43:18,038 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) [2023-11-12 00:43:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-12 00:43:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:43:18,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:18,039 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:18,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:43:18,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:18,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2023-11-12 00:43:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:18,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493437336] [2023-11-12 00:43:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:18,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:43:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191365088] [2023-11-12 00:43:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:43:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:18,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:18,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4aa100-b650-4da3-a1b8-5cb95f21d82e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:43:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:43:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:22,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 00:43:22,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:41,160 WARN L293 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)