./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:25:43,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:25:43,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:25:43,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:25:43,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:25:43,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:25:43,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:25:43,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:25:43,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:25:43,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:25:43,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:25:43,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:25:43,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:25:43,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:25:43,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:25:43,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:25:43,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:25:43,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:25:43,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:25:43,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:25:43,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:25:43,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:25:43,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:25:43,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:25:43,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:25:43,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:25:43,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:25:43,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:25:43,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:25:43,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:25:43,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:25:43,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:25:43,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:25:43,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:25:43,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:25:43,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:25:43,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:25:43,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:25:43,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:25:43,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:25:43,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:25:43,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:25:44,003 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:25:44,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:25:44,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:25:44,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:25:44,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:25:44,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:25:44,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:25:44,005 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:25:44,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:25:44,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:25:44,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:25:44,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:25:44,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:25:44,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:25:44,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 [2022-12-14 08:25:44,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:25:44,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:25:44,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:25:44,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:25:44,206 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:25:44,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/gcd_3.c [2022-12-14 08:25:46,807 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:25:46,966 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:25:46,966 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c [2022-12-14 08:25:46,971 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/5b6982ecc/cc0fe7e2e19b4338a3d95890c936b926/FLAG6e87d4547 [2022-12-14 08:25:46,982 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/5b6982ecc/cc0fe7e2e19b4338a3d95890c936b926 [2022-12-14 08:25:46,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:25:46,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:25:46,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:25:46,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:25:46,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:25:46,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:25:46" (1/1) ... [2022-12-14 08:25:46,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51121971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:46, skipping insertion in model container [2022-12-14 08:25:46,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:25:46" (1/1) ... [2022-12-14 08:25:46,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:25:47,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:25:47,121 WARN L237 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_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2022-12-14 08:25:47,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:25:47,144 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:25:47,154 WARN L237 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_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2022-12-14 08:25:47,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:25:47,170 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:25:47,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47 WrapperNode [2022-12-14 08:25:47,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:25:47,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:25:47,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:25:47,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:25:47,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,202 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-12-14 08:25:47,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:25:47,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:25:47,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:25:47,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:25:47,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:25:47,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:25:47,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:25:47,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:25:47,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (1/1) ... [2022-12-14 08:25:47,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:25:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:47,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:25:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:25:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:25:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:25:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:25:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:25:47,337 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:25:47,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:25:47,432 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:25:47,469 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:25:47,469 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:25:47,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:25:47 BoogieIcfgContainer [2022-12-14 08:25:47,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:25:47,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:25:47,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:25:47,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:25:47,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:25:46" (1/3) ... [2022-12-14 08:25:47,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4033f3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:25:47, skipping insertion in model container [2022-12-14 08:25:47,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:47" (2/3) ... [2022-12-14 08:25:47,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4033f3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:25:47, skipping insertion in model container [2022-12-14 08:25:47,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:25:47" (3/3) ... [2022-12-14 08:25:47,478 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2022-12-14 08:25:47,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:25:47,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:25:47,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:25:47,538 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@287a49f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:25:47,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:25:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:25:47,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:47,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:25:47,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash 84816067, now seen corresponding path program 1 times [2022-12-14 08:25:47,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:47,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186728457] [2022-12-14 08:25:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:47,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:47,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:47,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186728457] [2022-12-14 08:25:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186728457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:25:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:25:47,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:25:47,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154092896] [2022-12-14 08:25:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:25:47,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:25:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:25:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:25:47,868 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:47,959 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-12-14 08:25:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:25:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-12-14 08:25:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:47,967 INFO L225 Difference]: With dead ends: 24 [2022-12-14 08:25:47,967 INFO L226 Difference]: Without dead ends: 7 [2022-12-14 08:25:47,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:25:47,972 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:47,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-12-14 08:25:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-12-14 08:25:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-12-14 08:25:48,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2022-12-14 08:25:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:48,005 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-12-14 08:25:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-12-14 08:25:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:25:48,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:48,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:25:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:25:48,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1696327067, now seen corresponding path program 1 times [2022-12-14 08:25:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960529240] [2022-12-14 08:25:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:48,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:48,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487409858] [2022-12-14 08:25:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:48,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:48,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:48,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:48,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:25:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:25:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:55,270 WARN L859 $PredicateComparison]: unable to prove that (or (and (let ((.cse1 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (+ (- 256) .cse1) |ULTIMATE.start_gcd_test_#res#1|) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) .cse0)))) (< |c_ULTIMATE.start_main_~x~0#1| 0)) (and (<= 0 |c_ULTIMATE.start_main_~x~0#1|) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))) is different from true [2022-12-14 08:25:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:55,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:58,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960529240] [2022-12-14 08:25:58,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487409858] [2022-12-14 08:25:58,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487409858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325760016] [2022-12-14 08:25:58,638 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 08:25:58,638 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:58,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:58,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:58,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:58,894 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:59,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (< 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main_~y~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:59,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:59,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-14 08:25:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429793049] [2022-12-14 08:25:59,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:25:59,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:25:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=122, Unknown=2, NotChecked=22, Total=182 [2022-12-14 08:25:59,715 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:03,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:26:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:26:13,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-12-14 08:26:13,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=36, Invalid=122, Unknown=2, NotChecked=22, Total=182 [2022-12-14 08:26:13,004 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:13,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 1 Unknown, 3 Unchecked, 4.2s Time] [2022-12-14 08:26:13,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 08:26:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:26:13,208 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-12-14 08:26:13,216 INFO L158 Benchmark]: Toolchain (without parser) took 26230.91ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 113.0MB in the beginning and 50.3MB in the end (delta: 62.7MB). Peak memory consumption was 98.3MB. Max. memory is 16.1GB. [2022-12-14 08:26:13,217 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 148.9MB. Free memory is still 120.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:26:13,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.99ms. Allocated memory is still 148.9MB. Free memory was 113.0MB in the beginning and 102.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:26:13,217 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.87ms. Allocated memory is still 148.9MB. Free memory was 102.5MB in the beginning and 101.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:26:13,218 INFO L158 Benchmark]: Boogie Preprocessor took 16.08ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 99.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:26:13,218 INFO L158 Benchmark]: RCFGBuilder took 252.14ms. Allocated memory is still 148.9MB. Free memory was 99.9MB in the beginning and 86.3MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 08:26:13,219 INFO L158 Benchmark]: TraceAbstraction took 25742.09ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 85.8MB in the beginning and 50.3MB in the end (delta: 35.4MB). Peak memory consumption was 71.0MB. Max. memory is 16.1GB. [2022-12-14 08:26:13,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 148.9MB. Free memory is still 120.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.99ms. Allocated memory is still 148.9MB. Free memory was 113.0MB in the beginning and 102.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.87ms. Allocated memory is still 148.9MB. Free memory was 102.5MB in the beginning and 101.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.08ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 99.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 252.14ms. Allocated memory is still 148.9MB. Free memory was 99.9MB in the beginning and 86.3MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 25742.09ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 85.8MB in the beginning and 50.3MB in the end (delta: 35.4MB). Peak memory consumption was 71.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:26:14,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:26:14,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:26:14,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:26:14,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:26:14,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:26:14,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:26:14,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:26:14,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:26:14,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:26:14,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:26:14,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:26:14,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:26:14,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:26:14,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:26:14,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:26:14,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:26:14,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:26:14,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:26:14,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:26:14,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:26:14,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:26:14,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:26:14,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:26:14,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:26:14,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:26:14,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:26:14,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:26:14,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:26:14,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:26:14,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:26:14,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:26:14,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:26:14,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:26:14,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:26:14,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:26:14,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:26:14,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:26:14,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:26:14,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:26:14,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:26:14,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 08:26:14,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:26:14,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:26:14,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:26:14,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:26:14,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:26:14,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:26:14,509 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:26:14,509 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:26:14,509 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:26:14,509 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:26:14,509 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:26:14,510 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:26:14,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:26:14,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:26:14,512 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:26:14,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:26:14,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:26:14,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:26:14,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:26:14,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:26:14,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:26:14,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:26:14,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:26:14,514 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:26:14,514 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:26:14,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:26:14,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:26:14,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:26:14,515 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 [2022-12-14 08:26:14,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:26:14,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:26:14,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:26:14,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:26:14,732 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:26:14,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/gcd_3.c [2022-12-14 08:26:17,271 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:26:17,450 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:26:17,450 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c [2022-12-14 08:26:17,457 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/798fa779a/b1251dd4631c42019305b50e20d1d3d6/FLAG578bcdadf [2022-12-14 08:26:17,837 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/data/798fa779a/b1251dd4631c42019305b50e20d1d3d6 [2022-12-14 08:26:17,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:26:17,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:26:17,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:26:17,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:26:17,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:26:17,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:26:17" (1/1) ... [2022-12-14 08:26:17,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea9a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:17, skipping insertion in model container [2022-12-14 08:26:17,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:26:17" (1/1) ... [2022-12-14 08:26:17,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:26:17,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:26:17,958 WARN L237 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_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2022-12-14 08:26:17,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:26:17,977 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:26:17,986 WARN L237 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_14757fac-6fcf-42ad-a773-98658672a7cb/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2022-12-14 08:26:17,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:26:17,999 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:26:18,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18 WrapperNode [2022-12-14 08:26:18,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:26:18,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:26:18,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:26:18,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:26:18,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,023 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2022-12-14 08:26:18,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:26:18,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:26:18,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:26:18,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:26:18,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:26:18,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:26:18,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:26:18,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:26:18,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (1/1) ... [2022-12-14 08:26:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:26:18,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:26:18,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:26:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:26:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:26:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:26:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:26:18,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:26:18,161 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:26:18,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:26:18,284 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:26:18,289 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:26:18,289 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:26:18,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:26:18 BoogieIcfgContainer [2022-12-14 08:26:18,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:26:18,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:26:18,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:26:18,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:26:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:26:17" (1/3) ... [2022-12-14 08:26:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b64d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:26:18, skipping insertion in model container [2022-12-14 08:26:18,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:26:18" (2/3) ... [2022-12-14 08:26:18,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b64d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:26:18, skipping insertion in model container [2022-12-14 08:26:18,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:26:18" (3/3) ... [2022-12-14 08:26:18,297 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2022-12-14 08:26:18,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:26:18,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:26:18,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:26:18,351 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79b3ca20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:26:18,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:26:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:26:18,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:18,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:18,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times [2022-12-14 08:26:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:26:18,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607507907] [2022-12-14 08:26:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:26:18,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:26:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 08:26:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:26:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:18,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:26:18,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:26:18,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607507907] [2022-12-14 08:26:18,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607507907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:26:18,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:26:18,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:26:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675248885] [2022-12-14 08:26:18,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:26:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:26:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:26:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:26:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:26:18,545 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:26:18,590 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-12-14 08:26:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:26:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-12-14 08:26:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:26:18,597 INFO L225 Difference]: With dead ends: 28 [2022-12-14 08:26:18,597 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 08:26:18,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:26:18,601 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:18,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:26:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 08:26:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 08:26:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 08:26:18,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2022-12-14 08:26:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:26:18,625 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 08:26:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 08:26:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:26:18,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:18,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:18,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:26:18,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:18,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1742670346, now seen corresponding path program 1 times [2022-12-14 08:26:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:26:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263784029] [2022-12-14 08:26:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:18,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:26:18,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:26:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 08:26:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:18,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:26:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:18,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:26:18,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:26:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263784029] [2022-12-14 08:26:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263784029] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:26:18,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:26:18,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:26:18,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179027162] [2022-12-14 08:26:18,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:26:18,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:26:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:26:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:26:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:26:18,936 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:26:18,987 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 08:26:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:26:18,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-12-14 08:26:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:26:18,989 INFO L225 Difference]: With dead ends: 28 [2022-12-14 08:26:18,989 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 08:26:18,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:26:18,990 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:18,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:26:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 08:26:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2022-12-14 08:26:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-14 08:26:18,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2022-12-14 08:26:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:26:18,995 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-14 08:26:18,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-14 08:26:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:26:18,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:18,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:19,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 08:26:19,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:19,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1742950324, now seen corresponding path program 1 times [2022-12-14 08:26:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:26:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341209019] [2022-12-14 08:26:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:19,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:19,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:26:19,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:26:19,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 08:26:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:26:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:19,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:26:19,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:26:19,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341209019] [2022-12-14 08:26:19,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341209019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:26:19,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:26:19,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:26:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356236836] [2022-12-14 08:26:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:26:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:26:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:26:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:26:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:26:19,445 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:26:19,572 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-12-14 08:26:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:26:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2022-12-14 08:26:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:26:19,572 INFO L225 Difference]: With dead ends: 19 [2022-12-14 08:26:19,572 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 08:26:19,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:26:19,574 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:19,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:26:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 08:26:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-12-14 08:26:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-14 08:26:19,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2022-12-14 08:26:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:26:19,576 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-14 08:26:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-14 08:26:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:26:19,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:19,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:19,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 08:26:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:19,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash 607524954, now seen corresponding path program 1 times [2022-12-14 08:26:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:26:19,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454149908] [2022-12-14 08:26:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:19,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:26:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:26:19,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:26:19,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 08:26:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:26:19,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:26:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:35,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:26:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454149908] [2022-12-14 08:26:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454149908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:26:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572914247] [2022-12-14 08:26:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:26:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:26:35,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:26:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 08:26:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:26:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:47,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:26:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:57,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572914247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:26:57,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953912292] [2022-12-14 08:26:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:57,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:26:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:26:57,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:26:57,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:26:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:26:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:27:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:27:08,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:27:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:27:08,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953912292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:27:08,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:27:08,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 28 [2022-12-14 08:27:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114852149] [2022-12-14 08:27:08,764 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:27:08,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 08:27:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:27:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 08:27:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=611, Unknown=9, NotChecked=0, Total=756 [2022-12-14 08:27:08,766 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:27:13,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:27:19,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:27:21,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:27:23,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:27:28,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:28:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:42,561 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-12-14 08:28:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 08:28:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:28:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:42,568 INFO L225 Difference]: With dead ends: 35 [2022-12-14 08:28:42,568 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 08:28:42,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 122.3s TimeCoverageRelationStatistics Valid=407, Invalid=1369, Unknown=30, NotChecked=0, Total=1806 [2022-12-14 08:28:42,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 98 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 57 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 16.7s Time] [2022-12-14 08:28:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 08:28:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-12-14 08:28:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:28:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 08:28:42,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-12-14 08:28:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 08:28:42,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:28:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 08:28:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:28:42,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:42,574 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:28:42,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 08:28:42,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 08:28:42,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:28:43,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:28:43,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 729899826, now seen corresponding path program 2 times [2022-12-14 08:28:43,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:28:43,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710322778] [2022-12-14 08:28:43,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:28:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:28:43,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:28:43,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:28:43,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 08:28:53,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:28:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:28:53,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:28:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:30:12,777 WARN L233 SmtUtils]: Spent 10.42s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:30:29,330 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_23| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_23|))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_main_~x~0#1|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse5))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (bvsgt .cse2 (_ bv0 32)) (not (bvsge .cse2 .cse1)) (bvslt .cse3 (_ bv0 32))))))))) is different from false [2022-12-14 08:30:31,343 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_23| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_23|))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_main_~x~0#1|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse5))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (bvsgt .cse2 (_ bv0 32)) (not (bvsge .cse2 .cse1)) (bvslt .cse3 (_ bv0 32))))))))) is different from true [2022-12-14 08:30:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:30:31,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:33:50,937 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_8| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_8|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse2))))) (or (bvsge .cse0 .cse1) (bvslt .cse0 (_ bv0 32)) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse1))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32)))))))))) is different from false [2022-12-14 08:33:52,957 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_8| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_8|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse2))))) (or (bvsge .cse0 .cse1) (bvslt .cse0 (_ bv0 32)) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse1))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32)))))))))) is different from true [2022-12-14 08:33:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:52,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:33:52,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710322778] [2022-12-14 08:33:52,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710322778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:33:52,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [829141631] [2022-12-14 08:33:52,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:33:52,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:33:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:33:52,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:33:52,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 08:33:53,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:33:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:33:53,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 08:33:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:36:36,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:37:11,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_9| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_9|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse2))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse3))))) (or (bvsge .cse0 .cse1) (not (bvsgt .cse0 (_ bv0 32))) (not (bvslt .cse2 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1)))))))))))) is different from false [2022-12-14 08:37:13,569 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_9| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_9|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse2))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse3))))) (or (bvsge .cse0 .cse1) (not (bvsgt .cse0 (_ bv0 32))) (not (bvslt .cse2 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1)))))))))))) is different from true [2022-12-14 08:37:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [829141631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:37:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008011818] [2022-12-14 08:37:13,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:37:13,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:13,571 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14757fac-6fcf-42ad-a773-98658672a7cb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:37:16,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:37:16,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:37:16,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:37:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:38:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:39:24,037 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_10| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_10|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))))) (or (not (bvsgt .cse0 (_ bv0 32))) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse2))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32))) (bvsge .cse0 .cse2)))))))) is different from false [2022-12-14 08:39:26,060 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_10| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_10|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))))) (or (not (bvsgt .cse0 (_ bv0 32))) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse2))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32))) (bvsge .cse0 .cse2)))))))) is different from true [2022-12-14 08:39:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:39:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008011818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:39:26,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:39:26,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 33 [2022-12-14 08:39:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335047526] [2022-12-14 08:39:26,061 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:39:26,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 08:39:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:39:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 08:39:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=628, Unknown=106, NotChecked=228, Total=1056 [2022-12-14 08:39:26,064 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:39:28,083 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_10| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_10|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))))) (or (not (bvsgt .cse0 (_ bv0 32))) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse2))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32))) (bvsge .cse0 .cse2)))))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_9| (_ BitVec 8))) (let ((.cse8 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse6 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_9|)) (.cse11 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse8))))) (let ((.cse10 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse11))))) (let ((.cse9 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse11 .cse10))))) (let ((.cse7 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse10 .cse9))))) (or (bvsge .cse6 .cse7) (not (bvsgt .cse6 (_ bv0 32))) (not (bvslt .cse8 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse9 .cse7)))))))))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_8| (_ BitVec 8))) (let ((.cse15 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_8|)) (.cse17 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse15))))) (let ((.cse16 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse12 .cse17))))) (let ((.cse14 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse17 .cse16))))) (let ((.cse13 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse16 .cse14))))) (or (bvsge .cse12 .cse13) (bvslt .cse12 (_ bv0 32)) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse14 .cse13))) (_ bv0 32))) (not (bvslt .cse15 (_ bv0 32))))))))))) is different from false [2022-12-14 08:39:30,151 WARN L859 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_10| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_10|)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse5))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))))) (or (not (bvsgt .cse0 (_ bv0 32))) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse2))) (_ bv0 32))) (not (bvslt .cse3 (_ bv0 32))) (bvsge .cse0 .cse2)))))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_9| (_ BitVec 8))) (let ((.cse8 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse6 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_9|)) (.cse11 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse8))))) (let ((.cse10 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse11))))) (let ((.cse9 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse11 .cse10))))) (let ((.cse7 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse10 .cse9))))) (or (bvsge .cse6 .cse7) (not (bvsgt .cse6 (_ bv0 32))) (not (bvslt .cse8 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse9 .cse7)))))))))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main_~x~0#1_8| (_ BitVec 8))) (let ((.cse15 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 ((_ sign_extend 24) |v_ULTIMATE.start_main_~x~0#1_8|)) (.cse17 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse15))))) (let ((.cse16 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse12 .cse17))))) (let ((.cse14 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse17 .cse16))))) (let ((.cse13 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse16 .cse14))))) (or (bvsge .cse12 .cse13) (bvslt .cse12 (_ bv0 32)) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse14 .cse13))) (_ bv0 32))) (not (bvslt .cse15 (_ bv0 32))))))))))) is different from true [2022-12-14 08:39:50,414 WARN L233 SmtUtils]: Spent 16.16s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:39:53,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:40:14,905 WARN L233 SmtUtils]: Spent 15.30s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)