./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/gcd_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:17:16,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:17:16,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:17:16,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:17:16,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:17:16,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:17:16,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:17:16,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:17:16,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:17:16,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:17:16,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:17:16,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:17:16,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:17:16,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:17:16,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:17:16,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:17:16,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:17:16,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:17:16,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:17:16,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:17:16,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:17:16,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:17:16,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:17:16,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:17:16,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:17:16,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:17:16,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:17:16,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:17:16,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:17:16,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:17:16,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:17:16,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:17:16,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:17:16,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:17:16,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:17:16,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:17:16,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:17:16,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:17:16,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:17:16,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:17:16,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:17:16,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:17:16,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:17:16,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:17:16,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:17:16,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:17:16,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:17:16,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:17:16,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:17:16,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:17:16,196 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:17:16,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:17:16,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:17:16,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:17:16,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:17:16,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:17:16,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:17:16,200 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:17:16,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:17:16,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:17:16,200 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde [2021-12-21 10:17:16,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:17:16,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:17:16,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:17:16,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:17:16,409 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:17:16,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_1.c [2021-12-21 10:17:16,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3cdc933c/fe5fc318662c4f0f9f67e6a311218888/FLAGa327b6a84 [2021-12-21 10:17:16,777 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:17:16,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c [2021-12-21 10:17:16,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3cdc933c/fe5fc318662c4f0f9f67e6a311218888/FLAGa327b6a84 [2021-12-21 10:17:16,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3cdc933c/fe5fc318662c4f0f9f67e6a311218888 [2021-12-21 10:17:16,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:17:16,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:17:16,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:17:16,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:17:16,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:17:16,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:16,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8b9a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16, skipping insertion in model container [2021-12-21 10:17:16,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:16,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:17:16,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:17:16,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-12-21 10:17:16,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:17:16,970 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:17:16,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-12-21 10:17:16,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:17:16,995 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:17:16,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16 WrapperNode [2021-12-21 10:17:16,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:17:16,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:17:16,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:17:16,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:17:17,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,020 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2021-12-21 10:17:17,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:17:17,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:17:17,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:17:17,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:17:17,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:17:17,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:17:17,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:17:17,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:17:17,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (1/1) ... [2021-12-21 10:17:17,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:17:17,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:17:17,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:17:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:17:17,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:17:17,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:17:17,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:17:17,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:17:17,142 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:17:17,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:17:17,267 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:17:17,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:17:17,271 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:17:17,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:17:17 BoogieIcfgContainer [2021-12-21 10:17:17,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:17:17,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:17:17,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:17:17,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:17:17,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:17:16" (1/3) ... [2021-12-21 10:17:17,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:17:17, skipping insertion in model container [2021-12-21 10:17:17,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:17:16" (2/3) ... [2021-12-21 10:17:17,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:17:17, skipping insertion in model container [2021-12-21 10:17:17,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:17:17" (3/3) ... [2021-12-21 10:17:17,278 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2021-12-21 10:17:17,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:17:17,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:17:17,332 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:17:17,344 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:17:17,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:17:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:17:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 10:17:17,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:17:17,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:17:17,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:17:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:17:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2002478831, now seen corresponding path program 1 times [2021-12-21 10:17:17,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:17:17,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907451574] [2021-12-21 10:17:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:17:17,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:17:17,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:17:17,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027353330] [2021-12-21 10:17:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:17:17,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:17:17,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:17:17,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:17:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:17:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:17:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:17:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:17:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:17:17,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:17:17,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:17:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907451574] [2021-12-21 10:17:17,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:17:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027353330] [2021-12-21 10:17:17,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027353330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:17:17,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:17:17,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:17:17,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558992003] [2021-12-21 10:17:17,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:17:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:17:17,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:17:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:17:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:17:17,588 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:17:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:17:17,606 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-12-21 10:17:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:17:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 10:17:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:17:17,613 INFO L225 Difference]: With dead ends: 28 [2021-12-21 10:17:17,614 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 10:17:17,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:17:17,621 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 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 [2021-12-21 10:17:17,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:17:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 10:17:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 10:17:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:17:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-21 10:17:17,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-12-21 10:17:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:17:17,640 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-21 10:17:17,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:17:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-21 10:17:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 10:17:17,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:17:17,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:17:17,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:17:17,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-21 10:17:17,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:17:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:17:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1895646932, now seen corresponding path program 1 times [2021-12-21 10:17:17,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:17:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429781653] [2021-12-21 10:17:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:17:17,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:17:17,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:17:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800950075] [2021-12-21 10:17:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:17:17,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:17:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:17:17,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:17:17,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:17:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:17:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 10:17:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:17:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:17:17,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:17:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:17:18,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:17:18,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429781653] [2021-12-21 10:17:18,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:17:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800950075] [2021-12-21 10:17:18,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800950075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:17:18,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:17:18,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-21 10:17:18,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760076237] [2021-12-21 10:17:18,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:17:18,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:17:18,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:17:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:17:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:17:18,017 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-12-21 10:17:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:17:18,059 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-12-21 10:17:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:17:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2021-12-21 10:17:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:17:18,060 INFO L225 Difference]: With dead ends: 18 [2021-12-21 10:17:18,061 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 10:17:18,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:17:18,062 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:17:18,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:17:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 10:17:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 10:17:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-12-21 10:17:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-21 10:17:18,067 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-12-21 10:17:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:17:18,067 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-21 10:17:18,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-12-21 10:17:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-21 10:17:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 10:17:18,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:17:18,068 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:17:18,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:17:18,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-21 10:17:18,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:17:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:17:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1416141937, now seen corresponding path program 2 times [2021-12-21 10:17:18,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:17:18,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654482959] [2021-12-21 10:17:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:17:18,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:17:18,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:17:18,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785328431] [2021-12-21 10:17:18,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:17:18,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:17:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:17:18,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:17:18,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:17:26,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:17:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:17:26,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 10:17:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates...