./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/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_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/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_052c16d9-4001-462a-a439-8033fd1c50b5/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 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:52:29,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:52:29,784 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:52:29,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:52:29,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:52:29,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:52:29,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:52:29,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:52:29,816 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:52:29,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:52:29,822 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:52:29,823 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:52:29,824 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:52:29,826 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:52:29,826 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:52:29,827 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:52:29,827 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:52:29,828 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:52:29,828 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:52:29,829 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:52:29,829 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:52:29,830 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:52:29,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:52:29,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:52:29,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:52:29,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:52:29,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:52:29,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:52:29,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:52:29,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:52:29,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:52:29,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:52:29,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:52:29,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:52:29,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:52:29,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:52:29,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:29,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:52:29,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:52:29,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:52:29,861 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:52:29,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:52:29,863 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:52:29,863 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:52:29,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:52:29,864 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_052c16d9-4001-462a-a439-8033fd1c50b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f [2023-11-12 00:52:30,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:52:30,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:52:30,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:52:30,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:52:30,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:52:30,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2023-11-12 00:52:33,279 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:52:33,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:52:33,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2023-11-12 00:52:33,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/data/0aa076c91/1356d2d29cf641bf840d5916ac79b885/FLAG77e3d5b80 [2023-11-12 00:52:33,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/data/0aa076c91/1356d2d29cf641bf840d5916ac79b885 [2023-11-12 00:52:33,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:52:33,575 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:52:33,578 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:33,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:52:33,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:52:33,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3b2056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33, skipping insertion in model container [2023-11-12 00:52:33,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:52:33,808 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_052c16d9-4001-462a-a439-8033fd1c50b5/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[1226,1239] [2023-11-12 00:52:33,831 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_052c16d9-4001-462a-a439-8033fd1c50b5/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[2807,2820] [2023-11-12 00:52:33,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:33,844 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:52:33,857 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_052c16d9-4001-462a-a439-8033fd1c50b5/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[1226,1239] [2023-11-12 00:52:33,868 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_052c16d9-4001-462a-a439-8033fd1c50b5/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[2807,2820] [2023-11-12 00:52:33,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:33,897 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:52:33,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33 WrapperNode [2023-11-12 00:52:33,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:33,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:33,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:52:33,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:52:33,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,941 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-12 00:52:33,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:33,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:52:33,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:52:33,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:52:33,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,955 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,955 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,967 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:52:33,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:52:33,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:52:33,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:52:33,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:34,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:52:34,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:52:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:52:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-12 00:52:34,051 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-12 00:52:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-12 00:52:34,051 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-12 00:52:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:52:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:52:34,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:52:34,128 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:52:34,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:52:34,357 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:52:34,419 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:52:34,419 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:52:34,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:34 BoogieIcfgContainer [2023-11-12 00:52:34,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:52:34,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:52:34,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:52:34,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:52:34,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:52:33" (1/3) ... [2023-11-12 00:52:34,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dcb279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:34, skipping insertion in model container [2023-11-12 00:52:34,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (2/3) ... [2023-11-12 00:52:34,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dcb279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:34, skipping insertion in model container [2023-11-12 00:52:34,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:34" (3/3) ... [2023-11-12 00:52:34,432 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_6.i [2023-11-12 00:52:34,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:52:34,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:52:34,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:34,504 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;@2895d26f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:34,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:52:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:52:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:52:34,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:34,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:52:34,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:34,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -592026431, now seen corresponding path program 1 times [2023-11-12 00:52:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:34,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164219388] [2023-11-12 00:52:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:34,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:52:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338917440] [2023-11-12 00:52:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:34,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:34,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:52:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:34,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:52:34,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:34,886 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 00:52:34,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:52:34,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164219388] [2023-11-12 00:52:34,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:52:34,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338917440] [2023-11-12 00:52:34,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338917440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:34,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:34,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676465365] [2023-11-12 00:52:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:52:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:52:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:52:34,928 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 00:52:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:34,976 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-11-12 00:52:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:52:34,978 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 00:52:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:34,985 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:52:34,985 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:52:34,988 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 00:52:34,993 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 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 00:52:34,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:52:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:52:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-12 00:52:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:52:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-12 00:52:35,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2023-11-12 00:52:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:35,038 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-12 00:52:35,039 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 00:52:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-12 00:52:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:52:35,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:35,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:35,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:52:35,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:52:35,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:35,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1175005777, now seen corresponding path program 1 times [2023-11-12 00:52:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991597479] [2023-11-12 00:52:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:35,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:52:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390259928] [2023-11-12 00:52:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:35,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:35,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:52:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:35,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:52:35,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:35,508 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 00:52:35,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:52:35,603 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 00:52:35,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:35,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991597479] [2023-11-12 00:52:35,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:52:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390259928] [2023-11-12 00:52:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390259928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:52:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781257754] [2023-11-12 00:52:35,639 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:52:35,641 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:52:35,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:52:35,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:52:35,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:52:38,082 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:52:38,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161#(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 00:52:38,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:52:38,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:52:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:52:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459999994] [2023-11-12 00:52:38,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:52:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:52:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:52:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:52:38,491 INFO L87 Difference]: Start difference. First operand 21 states and 23 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 00:52:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:38,562 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-11-12 00:52:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:38,564 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 00:52:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:38,565 INFO L225 Difference]: With dead ends: 25 [2023-11-12 00:52:38,565 INFO L226 Difference]: Without dead ends: 22 [2023-11-12 00:52:38,566 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 [2023-11-12 00:52:38,568 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:38,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-12 00:52:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-12 00:52:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:52:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-12 00:52:38,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2023-11-12 00:52:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:38,589 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-12 00:52:38,589 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 00:52:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-12 00:52:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:52:38,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:38,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:38,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:52:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:52:38,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:38,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2067496319, now seen corresponding path program 2 times [2023-11-12 00:52:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881166581] [2023-11-12 00:52:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:38,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:52:38,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235603142] [2023-11-12 00:52:38,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:52:38,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:38,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:38,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:38,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_052c16d9-4001-462a-a439-8033fd1c50b5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:52:41,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:52:41,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:52:41,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 00:52:41,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:00,748 WARN L293 SmtUtils]: Spent 7.56s 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)