./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b --- 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-b5237d8 [2022-11-21 16:54:48,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:54:48,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:54:48,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:54:48,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:54:48,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:54:48,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:54:48,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:54:48,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:54:48,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:54:48,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:54:49,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:54:49,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:54:49,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:54:49,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:54:49,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:54:49,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:54:49,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:54:49,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:54:49,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:54:49,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:54:49,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:54:49,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:54:49,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:54:49,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:54:49,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:54:49,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:54:49,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:54:49,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:54:49,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:54:49,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:54:49,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:54:49,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:54:49,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:54:49,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:54:49,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:54:49,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:54:49,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:54:49,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:54:49,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:54:49,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:54:49,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:54:49,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:54:49,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:54:49,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:54:49,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:54:49,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:54:49,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:54:49,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:54:49,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:54:49,094 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:54:49,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:54:49,095 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:54:49,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:54:49,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:54:49,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:54:49,097 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:54:49,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:54:49,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:54:49,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:54:49,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:54:49,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:54:49,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:54:49,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:54:49,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:54:49,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:54:49,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:54:49,099 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:54:49,099 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:54:49,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:54:49,100 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_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b [2022-11-21 16:54:49,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:54:49,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:54:49,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:54:49,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:54:49,436 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:54:49,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2022-11-21 16:54:52,386 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:54:52,667 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:54:52,667 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2022-11-21 16:54:52,675 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/de8ad2d11/d65b293084154a11a44121420194d96e/FLAG725537f9b [2022-11-21 16:54:52,697 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/de8ad2d11/d65b293084154a11a44121420194d96e [2022-11-21 16:54:52,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:54:52,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:54:52,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:54:52,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:54:52,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:54:52,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:54:52" (1/1) ... [2022-11-21 16:54:52,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72947baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:52, skipping insertion in model container [2022-11-21 16:54:52,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:54:52" (1/1) ... [2022-11-21 16:54:52,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:54:52,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:54:52,952 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[1226,1239] [2022-11-21 16:54:52,991 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[2807,2820] [2022-11-21 16:54:52,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:54:53,012 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:54:53,033 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[1226,1239] [2022-11-21 16:54:53,057 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[2807,2820] [2022-11-21 16:54:53,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:54:53,076 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:54:53,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53 WrapperNode [2022-11-21 16:54:53,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:54:53,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:54:53,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:54:53,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:54:53,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,139 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-21 16:54:53,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:54:53,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:54:53,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:54:53,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:54:53,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:54:53,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:54:53,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:54:53,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:54:53,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (1/1) ... [2022-11-21 16:54:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:54:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:53,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:54:53,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:54:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:54:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 16:54:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 16:54:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 16:54:53,274 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 16:54:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:54:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:54:53,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:54:53,351 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:54:53,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:54:53,702 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:54:53,712 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:54:53,716 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:54:53,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:54:53 BoogieIcfgContainer [2022-11-21 16:54:53,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:54:53,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:54:53,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:54:53,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:54:53,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:54:52" (1/3) ... [2022-11-21 16:54:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee76289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:54:53, skipping insertion in model container [2022-11-21 16:54:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:54:53" (2/3) ... [2022-11-21 16:54:53,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee76289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:54:53, skipping insertion in model container [2022-11-21 16:54:53,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:54:53" (3/3) ... [2022-11-21 16:54:53,732 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_8.i [2022-11-21 16:54:53,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:54:53,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 16:54:53,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:54:53,839 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66b74fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:54:53,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 16:54:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:54:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:53,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:53,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:54:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-21 16:54:53,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:53,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207391244] [2022-11-21 16:54:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:54,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:54:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967930804] [2022-11-21 16:54:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:54,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:54,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:54:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:54:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:54,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:54,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:54,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207391244] [2022-11-21 16:54:54,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:54:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967930804] [2022-11-21 16:54:54,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967930804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:54,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:54:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287695437] [2022-11-21 16:54:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:54,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:54:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:54,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:54:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:54:54,249 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:54,283 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-11-21 16:54:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:54:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 16:54:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:54,295 INFO L225 Difference]: With dead ends: 66 [2022-11-21 16:54:54,295 INFO L226 Difference]: Without dead ends: 29 [2022-11-21 16:54:54,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:54:54,303 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:54,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:54:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-21 16:54:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-21 16:54:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-21 16:54:54,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2022-11-21 16:54:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:54,347 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-21 16:54:54,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-21 16:54:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:54:54,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:54,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:54,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 16:54:54,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:54:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-21 16:54:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393992432] [2022-11-21 16:54:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:54,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:54:54,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162828008] [2022-11-21 16:54:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:54,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:54,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:54,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:54,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:54:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:54:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:54,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:54:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393992432] [2022-11-21 16:54:54,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:54:54,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162828008] [2022-11-21 16:54:54,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162828008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:54:54,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:54:54,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:54:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084038104] [2022-11-21 16:54:54,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:54:54,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:54:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:54:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:54,753 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:54,776 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-21 16:54:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:54:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 16:54:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:54,778 INFO L225 Difference]: With dead ends: 36 [2022-11-21 16:54:54,778 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 16:54:54,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:54:54,780 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:54,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:54:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 16:54:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-21 16:54:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-21 16:54:54,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-21 16:54:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:54,788 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-21 16:54:54,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-21 16:54:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:54:54,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:54,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:54,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:54,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:54,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:54:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-21 16:54:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:54,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889504064] [2022-11-21 16:54:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:54,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:55,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:54:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732672798] [2022-11-21 16:54:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:55,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:55,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:54:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:54:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:54:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:54:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:55,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:54:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:54:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:54:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889504064] [2022-11-21 16:54:55,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:54:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732672798] [2022-11-21 16:54:55,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732672798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:54:55,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:54:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-21 16:54:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165291502] [2022-11-21 16:54:55,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:54:55,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:54:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:54:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:54:55,194 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:54:55,261 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-21 16:54:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:54:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 16:54:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:54:55,263 INFO L225 Difference]: With dead ends: 36 [2022-11-21 16:54:55,263 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 16:54:55,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:54:55,265 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:54:55,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 155 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:54:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 16:54:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-21 16:54:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:54:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-21 16:54:55,272 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-11-21 16:54:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:54:55,273 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-21 16:54:55,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-21 16:54:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:54:55,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:54:55,275 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:54:55,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:54:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:55,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:54:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:54:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-21 16:54:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:54:55,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887428509] [2022-11-21 16:54:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:54:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:54:55,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:54:55,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330178766] [2022-11-21 16:54:55,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:54:55,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:54:55,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:54:55,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:54:55,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:55:06,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:55:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:55:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-21 16:55:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:55:58,413 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-21 16:56:19,074 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-21 16:56:40,357 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 16:57:00,516 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 16:57:02,518 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2022-11-21 16:57:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 16:57:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:58:09,146 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-21 16:59:16,055 WARN L233 SmtUtils]: Spent 46.38s on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:00:44,044 WARN L233 SmtUtils]: Spent 25.23s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:01:29,981 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse1 (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (<= .cse1 127)) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0))))) is different from true [2022-11-21 17:01:51,710 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2022-11-21 17:01:53,713 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2022-11-21 17:01:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 17:01:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887428509] [2022-11-21 17:01:53,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:01:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330178766] [2022-11-21 17:01:53,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330178766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:01:53,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:01:53,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2022-11-21 17:01:53,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948508186] [2022-11-21 17:01:53,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:01:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 17:01:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 17:01:53,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=119, Unknown=22, NotChecked=196, Total=380 [2022-11-21 17:01:53,723 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:02:48,592 WARN L233 SmtUtils]: Spent 48.56s on a formula simplification. DAG size of input: 45 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:02:50,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:02:53,378 WARN L859 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse5 (<= .cse6 127))) (and (let ((.cse4 (mod (+ .cse6 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse4 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse5 (= .cse4 0))) (let ((.cse7 (mod (mod .cse6 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse5) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse7) 256) 0)) (= .cse7 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from true [2022-11-21 17:02:55,384 WARN L837 $PredicateComparison]: unable to prove that (and (or (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ .cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse1 (<= .cse13 127)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse8 (mod .cse12 256))) (let ((.cse0 (<= .cse8 127)) (.cse2 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse13)) 256) 0))) (.cse5 (= .cse13 0)) (.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 0))) (.cse3 (not .cse9)) (.cse7 (not .cse1))) (and (or .cse0 (let ((.cse4 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse8)) 256) 0)) .cse9))) (and (or .cse1 (and (or .cse2 .cse3) .cse4)) (or (and .cse4 (or .cse5 .cse6 .cse3)) .cse7)))) (or (not .cse0) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (= .cse8 0))) (.cse10 (= .cse12 0))) (and (or (and (or .cse10 .cse2 .cse3) .cse11) .cse1) (or (and .cse11 (or .cse10 .cse5 .cse6 .cse3)) .cse7))))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse14 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse14 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse14) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse15 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse15) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from false [2022-11-21 17:02:57,408 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse30 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse30 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse30) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse31 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse31 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse31) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from false [2022-11-21 17:03:01,350 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 128))) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256) 0)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse0 127) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (let ((.cse1 (mod (+ (- 256) .cse2) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse1 0) (not (<= .cse2 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) (< 0 |c_ULTIMATE.start_gcd_test_~a#1|)) is different from false [2022-11-21 17:03:03,358 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-21 17:03:05,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 17:03:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:05,730 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-11-21 17:03:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:03:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 17:03:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:05,733 INFO L225 Difference]: With dead ends: 40 [2022-11-21 17:03:05,733 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 17:03:05,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 218.5s TimeCoverageRelationStatistics Valid=57, Invalid=144, Unknown=29, NotChecked=420, Total=650 [2022-11-21 17:03:05,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:05,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 265 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 1 Unknown, 112 Unchecked, 3.9s Time] [2022-11-21 17:03:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 17:03:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-21 17:03:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:03:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-21 17:03:05,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-11-21 17:03:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:05,744 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-21 17:03:05,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-21 17:03:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:03:05,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:05,746 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:05,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 17:03:05,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:05,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2022-11-21 17:03:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:05,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097129941] [2022-11-21 17:03:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:05,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:03:05,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647723391] [2022-11-21 17:03:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:05,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:05,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:05,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:03:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:03:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:03:06,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:49,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-11-21 17:03:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097129941] [2022-11-21 17:03:49,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:03:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647723391] [2022-11-21 17:03:49,509 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-21 17:03:49,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:03:49,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:49,710 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_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:648) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) 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) ... 52 more [2022-11-21 17:03:49,714 INFO L158 Benchmark]: Toolchain (without parser) took 537010.87ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 116.0MB in the beginning and 58.1MB in the end (delta: 57.9MB). Peak memory consumption was 87.8MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,714 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 121.6MB. Free memory is still 75.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:03:49,714 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.53ms. Allocated memory is still 146.8MB. Free memory was 116.0MB in the beginning and 104.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,715 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.03ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 102.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,715 INFO L158 Benchmark]: Boogie Preprocessor took 43.51ms. Allocated memory is still 146.8MB. Free memory was 102.5MB in the beginning and 101.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,715 INFO L158 Benchmark]: RCFGBuilder took 535.13ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 88.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,716 INFO L158 Benchmark]: TraceAbstraction took 535991.02ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 88.3MB in the beginning and 58.1MB in the end (delta: 30.2MB). Peak memory consumption was 60.5MB. Max. memory is 16.1GB. [2022-11-21 17:03:49,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 121.6MB. Free memory is still 75.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.53ms. Allocated memory is still 146.8MB. Free memory was 116.0MB in the beginning and 104.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.03ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 102.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.51ms. Allocated memory is still 146.8MB. Free memory was 102.5MB in the beginning and 101.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 535.13ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 88.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 535991.02ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 88.3MB in the beginning and 58.1MB in the end (delta: 30.2MB). Peak memory consumption was 60.5MB. 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_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b --- 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-b5237d8 [2022-11-21 17:03:51,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:03:51,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:03:51,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:03:51,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:03:51,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:03:51,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:03:51,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:03:51,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:03:51,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:03:51,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:03:51,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:03:51,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:03:51,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:03:51,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:03:51,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:03:52,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:03:52,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:03:52,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:03:52,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:03:52,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:03:52,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:03:52,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:03:52,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:03:52,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:03:52,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:03:52,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:03:52,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:03:52,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:03:52,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:03:52,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:03:52,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:03:52,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:03:52,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:03:52,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:03:52,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:03:52,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:03:52,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:03:52,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:03:52,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:03:52,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:03:52,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-21 17:03:52,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:03:52,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:03:52,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:03:52,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:03:52,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:03:52,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:03:52,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:03:52,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:03:52,098 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:03:52,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:03:52,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:03:52,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:03:52,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:03:52,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:03:52,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:03:52,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:03:52,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:03:52,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 17:03:52,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 17:03:52,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:03:52,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:03:52,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:03:52,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:03:52,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:03:52,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:03:52,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:03:52,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:52,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:03:52,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:03:52,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:03:52,106 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 17:03:52,106 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 17:03:52,107 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:03:52,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:03:52,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:03:52,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 17:03:52,108 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_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b [2022-11-21 17:03:52,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:03:52,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:03:52,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:03:52,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:03:52,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:03:52,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2022-11-21 17:03:55,556 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:03:55,803 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:03:55,804 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2022-11-21 17:03:55,811 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/5bf57696c/1f288f22240d4d4f99725dde04484cb1/FLAG267803736 [2022-11-21 17:03:55,826 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/data/5bf57696c/1f288f22240d4d4f99725dde04484cb1 [2022-11-21 17:03:55,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:03:55,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:03:55,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:55,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:03:55,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:03:55,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:55" (1/1) ... [2022-11-21 17:03:55,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ecafd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:55, skipping insertion in model container [2022-11-21 17:03:55,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:55" (1/1) ... [2022-11-21 17:03:55,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:03:55,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:03:56,096 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[1226,1239] [2022-11-21 17:03:56,148 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[2807,2820] [2022-11-21 17:03:56,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:56,171 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:03:56,191 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[1226,1239] [2022-11-21 17:03:56,218 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_911c97dd-547f-4646-8ea7-7387f338af33/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i[2807,2820] [2022-11-21 17:03:56,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:56,246 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:03:56,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56 WrapperNode [2022-11-21 17:03:56,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:56,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:56,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:03:56,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:03:56,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,313 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2022-11-21 17:03:56,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:56,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:03:56,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:03:56,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:03:56,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:03:56,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:03:56,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:03:56,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:03:56,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (1/1) ... [2022-11-21 17:03:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:56,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:03:56,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:03:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:03:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 17:03:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 17:03:56,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 17:03:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 17:03:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 17:03:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:03:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:03:56,550 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:03:56,552 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:04:05,664 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:04:05,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:04:05,671 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 17:04:05,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:04:05 BoogieIcfgContainer [2022-11-21 17:04:05,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:04:05,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:04:05,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:04:05,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:04:05,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:03:55" (1/3) ... [2022-11-21 17:04:05,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a212ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:04:05, skipping insertion in model container [2022-11-21 17:04:05,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:56" (2/3) ... [2022-11-21 17:04:05,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a212ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:04:05, skipping insertion in model container [2022-11-21 17:04:05,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:04:05" (3/3) ... [2022-11-21 17:04:05,682 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_8.i [2022-11-21 17:04:05,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:04:05,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 17:04:05,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:04:05,750 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36bb8ec8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:04:05,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 17:04:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:04:05,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:05,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:05,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-21 17:04:05,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:05,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573189578] [2022-11-21 17:04:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:05,783 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 [2022-11-21 17:04:05,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:05,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:05,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 17:04:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:05,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:04:05,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:04:05,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573189578] [2022-11-21 17:04:05,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573189578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:04:05,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:04:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:04:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071412356] [2022-11-21 17:04:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:04:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:04:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:04:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:04:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:04:05,988 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:06,016 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-11-21 17:04:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:04:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 17:04:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:06,025 INFO L225 Difference]: With dead ends: 66 [2022-11-21 17:04:06,025 INFO L226 Difference]: Without dead ends: 29 [2022-11-21 17:04:06,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:04:06,035 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:06,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:04:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-21 17:04:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-21 17:04:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-21 17:04:06,079 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2022-11-21 17:04:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:06,080 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-21 17:04:06,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-21 17:04:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:04:06,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:06,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:06,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:06,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:06,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-21 17:04:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:06,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977788647] [2022-11-21 17:04:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:06,300 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 [2022-11-21 17:04:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:06,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:06,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:04:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:06,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:04:06,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:04:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977788647] [2022-11-21 17:04:06,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977788647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:04:06,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:04:06,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:04:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105122717] [2022-11-21 17:04:06,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:04:06,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:04:06,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:04:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:04:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:04:06,561 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:06,622 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-21 17:04:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:04:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 17:04:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:06,625 INFO L225 Difference]: With dead ends: 36 [2022-11-21 17:04:06,625 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 17:04:06,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:04:06,627 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:06,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:04:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 17:04:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-21 17:04:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-21 17:04:06,634 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-21 17:04:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:06,635 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-21 17:04:06,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-21 17:04:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:04:06,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:06,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:06,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:06,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-21 17:04:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623774214] [2022-11-21 17:04:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:06,846 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 [2022-11-21 17:04:06,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:06,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:06,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:04:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:07,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:07,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:04:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623774214] [2022-11-21 17:04:07,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623774214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:04:07,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:04:07,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-21 17:04:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527904563] [2022-11-21 17:04:07,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:04:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:04:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:04:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:04:07,465 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:07,918 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-21 17:04:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:04:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 17:04:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:07,920 INFO L225 Difference]: With dead ends: 36 [2022-11-21 17:04:07,920 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 17:04:07,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:04:07,922 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:07,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 155 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:04:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 17:04:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-21 17:04:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-21 17:04:07,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-11-21 17:04:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-21 17:04:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-21 17:04:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:04:07,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:07,935 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:07,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:08,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:08,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-21 17:04:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181478390] [2022-11-21 17:04:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:04:08,151 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 [2022-11-21 17:04:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:08,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:08,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:09,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:04:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:04:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:04:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:13,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:04:24,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:04:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181478390] [2022-11-21 17:04:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181478390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:04:24,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:04:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2022-11-21 17:04:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068307289] [2022-11-21 17:04:24,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:04:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:04:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:04:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2022-11-21 17:04:24,016 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:27,619 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 [0] [2022-11-21 17:04:29,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:44,233 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-21 17:04:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:04:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 17:04:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:44,239 INFO L225 Difference]: With dead ends: 44 [2022-11-21 17:04:44,239 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 17:04:44,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=66, Invalid=173, Unknown=1, NotChecked=0, Total=240 [2022-11-21 17:04:44,241 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:44,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 190 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-21 17:04:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 17:04:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-21 17:04:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-21 17:04:44,252 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 13 [2022-11-21 17:04:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:44,253 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-21 17:04:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-21 17:04:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:04:44,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:44,257 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:44,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:44,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:44,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash -326992466, now seen corresponding path program 1 times [2022-11-21 17:04:44,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154832890] [2022-11-21 17:04:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:44,469 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 [2022-11-21 17:04:44,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:44,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:44,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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)] Waiting until timeout for monitored process [2022-11-21 17:04:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:44,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:04:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:04:45,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:04:45,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:04:45,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154832890] [2022-11-21 17:04:45,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154832890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:04:45,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:04:45,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-21 17:04:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618294328] [2022-11-21 17:04:45,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:04:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:04:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:04:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:04:45,762 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2022-11-21 17:04:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:46,039 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-21 17:04:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:04:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 17:04:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:46,040 INFO L225 Difference]: With dead ends: 32 [2022-11-21 17:04:46,040 INFO L226 Difference]: Without dead ends: 20 [2022-11-21 17:04:46,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:04:46,041 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:46,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:04:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-21 17:04:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-21 17:04:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:04:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-21 17:04:46,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-11-21 17:04:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:46,047 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-21 17:04:46,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2022-11-21 17:04:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-21 17:04:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:04:46,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:46,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:46,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:46,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:04:46,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1535073882, now seen corresponding path program 1 times [2022-11-21 17:04:46,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:04:46,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690019857] [2022-11-21 17:04:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:46,250 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 [2022-11-21 17:04:46,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:04:46,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 17:04:46,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 (7)] Waiting until timeout for monitored process [2022-11-21 17:05:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:05:03,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:08:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:08:00,770 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-21 17:08:00,771 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:08:00,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-21 17:08:00,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 17:08:00,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:08:00,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 17:08:00,976 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-21 17:08:00,980 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 17:08:01,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 05:08:01 BoogieIcfgContainer [2022-11-21 17:08:01,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 17:08:01,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 17:08:01,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 17:08:01,010 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 17:08:01,010 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:04:05" (3/4) ... [2022-11-21 17:08:01,012 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 17:08:01,061 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 17:08:01,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 17:08:01,062 INFO L158 Benchmark]: Toolchain (without parser) took 245232.40ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 44.5MB in the end (delta: 13.8MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,062 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 58.7MB. Free memory is still 37.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:08:01,063 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.02ms. Allocated memory is still 79.7MB. Free memory was 58.0MB in the beginning and 46.0MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.09ms. Allocated memory is still 79.7MB. Free memory was 46.0MB in the beginning and 44.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,064 INFO L158 Benchmark]: Boogie Preprocessor took 63.59ms. Allocated memory is still 79.7MB. Free memory was 44.3MB in the beginning and 42.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,065 INFO L158 Benchmark]: RCFGBuilder took 9293.80ms. Allocated memory is still 79.7MB. Free memory was 42.4MB in the beginning and 53.4MB in the end (delta: -10.9MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,065 INFO L158 Benchmark]: TraceAbstraction took 235334.05ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 46.7MB in the end (delta: 5.8MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,065 INFO L158 Benchmark]: Witness Printer took 51.92ms. Allocated memory is still 79.7MB. Free memory was 46.7MB in the beginning and 44.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:08:01,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 58.7MB. Free memory is still 37.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 417.02ms. Allocated memory is still 79.7MB. Free memory was 58.0MB in the beginning and 46.0MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.09ms. Allocated memory is still 79.7MB. Free memory was 46.0MB in the beginning and 44.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.59ms. Allocated memory is still 79.7MB. Free memory was 44.3MB in the beginning and 42.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 9293.80ms. Allocated memory is still 79.7MB. Free memory was 42.4MB in the beginning and 53.4MB in the end (delta: -10.9MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 235334.05ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 46.7MB in the end (delta: 5.8MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Witness Printer took 51.92ms. Allocated memory is still 79.7MB. Free memory was 46.7MB in the beginning and 44.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 102]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L75] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L91] RET assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L93] CALL, EXPR f(IN) VAL [\old(x)=-1.2948752641677856] [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=-1.2948752641677856, \result=-0.9645689725875854, x=-1.2948752641677856] [L93] RET, EXPR f(IN) VAL [f(IN)=-0.9645689725875854, IN=-1.2948752641677856] [L93] CALL, EXPR fp(IN) VAL [\old(x)=-1.2948752641677856] [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=-1.2948752641677856, \result=0.28533467650413513, x=-1.2948752641677856] [L93] RET, EXPR fp(IN) VAL [f(IN)=-0.9645689725875854, fp(IN)=0.28533467650413513, IN=-1.2948752641677856] [L93] float x = IN - f(IN)/fp(IN); [L95] CALL, EXPR f(x) VAL [\old(x)=2.0856075286865234] [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=2.0856075286865234, \result=0.9365200996398926, x=2.0856075286865234] [L95] RET, EXPR f(x) VAL [f(x)=0.9365200996398926, IN=-1.2948752641677856, x=2.0856075286865234] [L95] CALL, EXPR fp(x) VAL [\old(x)=2.0856075286865234] [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=2.0856075286865234, \result=-0.2722248435020447, x=2.0856075286865234] [L95] RET, EXPR fp(x) VAL [f(x)=0.9365200996398926, fp(x)=-0.2722248435020447, IN=-1.2948752641677856, x=2.0856075286865234] [L95] x = x - f(x)/fp(x) [L101] COND TRUE !(x < 0.1) VAL [IN=-1.2948752641677856, x=5.525852203369141] [L102] reach_error() VAL [IN=-1.2948752641677856, x=5.525852203369141] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 235.2s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 511 SdHoareTripleChecker+Invalid, 7.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 362 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 115 IncrementalHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 149 mSDtfsCounter, 115 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 23.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 19.0s SatisfiabilityAnalysisTime, 16.4s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 4 QuantifiedInterpolants, 423 SizeOfPredicates, 20 NumberOfNonLiveVariables, 230 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-21 17:08:01,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c97dd-547f-4646-8ea7-7387f338af33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE