./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/gcd_4+newton_2_8.i -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 131b2ae9424ecd75292a5889f04853eea3cca0c3e4c679243c4666d6f4003ffe --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:16:17,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:16:17,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:16:17,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:16:17,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:16:17,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:16:17,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:16:17,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:16:17,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:16:17,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:16:17,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:16:17,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:16:17,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:16:17,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:16:17,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:16:17,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:16:17,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:16:17,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:16:17,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:16:17,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:16:17,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:16:17,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:16:17,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:16:17,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:16:17,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:16:17,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:16:17,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:16:17,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:16:17,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:16:17,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:16:17,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:16:17,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:16:17,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:16:17,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:16:17,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:16:17,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:16:17,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:16:17,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:16:17,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:16:17,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:16:17,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:16:17,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:16:17,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:16:17,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:16:17,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:16:17,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:16:17,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:16:17,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:16:17,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:16:17,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:16:17,269 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:16:17,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:16:17,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:16:17,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:16:17,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:16:17,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:16:17,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:16:17,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:16:17,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:16:17,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:16:17,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:16:17,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:16:17,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:16:17,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:16:17,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:16:17,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:16:17,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:16:17,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:16:17,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:16:17,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:16:17,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 131b2ae9424ecd75292a5889f04853eea3cca0c3e4c679243c4666d6f4003ffe [2021-12-17 20:16:17,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:16:17,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:16:17,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:16:17,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:16:17,481 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:16:17,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_8.i [2021-12-17 20:16:17,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfebdd0e7/e2a146dcbac5412c8613089cac24b040/FLAGd05d9aa09 [2021-12-17 20:16:17,909 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:16:17,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_8.i [2021-12-17 20:16:17,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfebdd0e7/e2a146dcbac5412c8613089cac24b040/FLAGd05d9aa09 [2021-12-17 20:16:17,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfebdd0e7/e2a146dcbac5412c8613089cac24b040 [2021-12-17 20:16:17,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:16:17,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:16:17,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:16:17,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:16:17,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:16:17,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:16:17" (1/1) ... [2021-12-17 20:16:17,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6755c4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:17, skipping insertion in model container [2021-12-17 20:16:17,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:16:17" (1/1) ... [2021-12-17 20:16:17,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:16:17,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:16:18,084 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/combinations/gcd_4+newton_2_8.i[1224,1237] [2021-12-17 20:16:18,119 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/combinations/gcd_4+newton_2_8.i[2827,2840] [2021-12-17 20:16:18,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:16:18,127 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:16:18,139 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/combinations/gcd_4+newton_2_8.i[1224,1237] [2021-12-17 20:16:18,158 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/combinations/gcd_4+newton_2_8.i[2827,2840] [2021-12-17 20:16:18,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:16:18,169 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:16:18,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18 WrapperNode [2021-12-17 20:16:18,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:16:18,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:16:18,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:16:18,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:16:18,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,205 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2021-12-17 20:16:18,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:16:18,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:16:18,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:16:18,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:16:18,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:16:18,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:16:18,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:16:18,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:16:18,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (1/1) ... [2021-12-17 20:16:18,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:16:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:16:18,260 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) [2021-12-17 20:16:18,289 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 [2021-12-17 20:16:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:16:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-17 20:16:18,304 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-17 20:16:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-17 20:16:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-17 20:16:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:16:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:16:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:16:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 20:16:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 20:16:18,351 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:16:18,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:16:18,493 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:16:18,497 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:16:18,511 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 20:16:18,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:18 BoogieIcfgContainer [2021-12-17 20:16:18,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:16:18,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:16:18,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:16:18,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:16:18,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:16:17" (1/3) ... [2021-12-17 20:16:18,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a4d4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:16:18, skipping insertion in model container [2021-12-17 20:16:18,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:18" (2/3) ... [2021-12-17 20:16:18,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a4d4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:16:18, skipping insertion in model container [2021-12-17 20:16:18,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:18" (3/3) ... [2021-12-17 20:16:18,518 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_8.i [2021-12-17 20:16:18,522 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:16:18,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:16:18,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:16:18,592 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 [2021-12-17 20:16:18,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:16:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 20:16:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 20:16:18,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:18,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:18,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-17 20:16:18,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:18,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398840333] [2021-12-17 20:16:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:18,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:18,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:16:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398840333] [2021-12-17 20:16:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398840333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:18,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:18,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118337775] [2021-12-17 20:16:18,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:18,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:16:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:18,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:18,769 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:18,810 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-17 20:16:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:18,811 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 20:16:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:18,816 INFO L225 Difference]: With dead ends: 93 [2021-12-17 20:16:18,816 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 20:16:18,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:18,820 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:18,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:16:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 20:16:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-17 20:16:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-17 20:16:18,844 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-17 20:16:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:18,844 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-17 20:16:18,844 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-17 20:16:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 20:16:18,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:18,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:18,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:16:18,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-17 20:16:18,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:18,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324615636] [2021-12-17 20:16:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:18,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:18,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:16:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324615636] [2021-12-17 20:16:18,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324615636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:18,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:18,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:18,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642426729] [2021-12-17 20:16:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:18,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:18,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:16:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:18,871 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:18,884 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-17 20:16:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 20:16:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:18,886 INFO L225 Difference]: With dead ends: 52 [2021-12-17 20:16:18,886 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 20:16:18,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:18,887 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:18,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:16:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 20:16:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 20:16:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-17 20:16:18,902 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-17 20:16:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:18,902 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-17 20:16:18,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-17 20:16:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 20:16:18,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:18,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:18,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:16:18,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-17 20:16:18,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:18,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65616493] [2021-12-17 20:16:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:18,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:18,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 20:16:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100186259] [2021-12-17 20:16:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:18,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:16:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:16:18,919 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) [2021-12-17 20:16:18,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:16:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 20:16:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:19,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 20:16:19,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:16:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65616493] [2021-12-17 20:16:19,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 20:16:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100186259] [2021-12-17 20:16:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100186259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:19,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:19,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:19,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800789608] [2021-12-17 20:16:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:16:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:19,077 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:19,088 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-17 20:16:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:19,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 20:16:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:19,089 INFO L225 Difference]: With dead ends: 53 [2021-12-17 20:16:19,089 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 20:16:19,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:19,100 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:19,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:16:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 20:16:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-17 20:16:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-17 20:16:19,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2021-12-17 20:16:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-17 20:16:19,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-17 20:16:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 20:16:19,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:19,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:19,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 20:16:19,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:16:19,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2021-12-17 20:16:19,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621897237] [2021-12-17 20:16:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:19,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:19,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 20:16:19,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731452508] [2021-12-17 20:16:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:19,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:16:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:16:19,317 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) [2021-12-17 20:16:19,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 20:16:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 20:16:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:19,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:16:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:19,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:16:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621897237] [2021-12-17 20:16:19,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 20:16:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731452508] [2021-12-17 20:16:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731452508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:16:19,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 20:16:19,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-17 20:16:19,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502086533] [2021-12-17 20:16:19,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 20:16:19,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:16:19,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:16:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:16:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:16:19,484 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:19,519 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-17 20:16:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:16:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-17 20:16:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:19,520 INFO L225 Difference]: With dead ends: 57 [2021-12-17 20:16:19,521 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 20:16:19,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:16:19,522 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:19,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 100 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:16:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 20:16:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 20:16:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-17 20:16:19,549 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2021-12-17 20:16:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:19,550 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-17 20:16:19,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-17 20:16:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 20:16:19,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:19,551 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:19,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 20:16:19,757 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,SelfDestructingSolverStorable3 [2021-12-17 20:16:19,757 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-17 20:16:19,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:19,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860007839] [2021-12-17 20:16:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:19,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:19,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 20:16:19,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550332451] [2021-12-17 20:16:19,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 20:16:19,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:16:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:16:19,769 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) [2021-12-17 20:16:19,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 20:16:19,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 20:16:19,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 20:16:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 20:16:19,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:19,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:16:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:20,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:16:20,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860007839] [2021-12-17 20:16:20,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 20:16:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550332451] [2021-12-17 20:16:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550332451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:16:20,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 20:16:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-17 20:16:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249200133] [2021-12-17 20:16:20,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 20:16:20,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 20:16:20,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:16:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 20:16:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-17 20:16:20,023 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:20,098 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-12-17 20:16:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 20:16:20,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 20:16:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:20,100 INFO L225 Difference]: With dead ends: 65 [2021-12-17 20:16:20,101 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 20:16:20,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-17 20:16:20,102 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:20,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:16:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 20:16:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-17 20:16:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-12-17 20:16:20,110 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2021-12-17 20:16:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:20,110 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-12-17 20:16:20,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-12-17 20:16:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 20:16:20,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:20,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:20,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 20:16:20,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:16:20,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-12-17 20:16:20,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:16:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583233147] [2021-12-17 20:16:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:20,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:16:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 20:16:20,325 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 20:16:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 20:16:20,341 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 20:16:20,341 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 20:16:20,342 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 20:16:20,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 20:16:20,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:16:20,346 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-17 20:16:20,347 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 20:16:20,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:16:20 BoogieIcfgContainer [2021-12-17 20:16:20,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 20:16:20,362 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 20:16:20,362 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 20:16:20,362 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 20:16:20,363 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:18" (3/4) ... [2021-12-17 20:16:20,364 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 20:16:20,364 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 20:16:20,365 INFO L158 Benchmark]: Toolchain (without parser) took 2431.27ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 83.1MB in the beginning and 100.6MB in the end (delta: -17.5MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,365 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 20:16:20,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.83ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 83.8MB in the end (delta: -1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,366 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.82ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 82.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,366 INFO L158 Benchmark]: Boogie Preprocessor took 27.75ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 80.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 20:16:20,366 INFO L158 Benchmark]: RCFGBuilder took 278.97ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 70.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,366 INFO L158 Benchmark]: TraceAbstraction took 1847.68ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 69.6MB in the beginning and 100.6MB in the end (delta: -31.0MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,367 INFO L158 Benchmark]: Witness Printer took 2.33ms. Allocated memory is still 159.4MB. Free memory was 100.6MB in the beginning and 100.6MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 20:16:20,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.83ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 83.8MB in the end (delta: -1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.82ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 82.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.75ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 80.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.97ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 70.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1847.68ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 69.6MB in the beginning and 100.6MB in the end (delta: -31.0MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. * Witness Printer took 2.33ms. Allocated memory is still 159.4MB. Free memory was 100.6MB in the beginning and 100.6MB in the end (delta: 2.0kB). 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 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L100] CALL, EXPR f(IN) VAL [\old(x)=54] [L87] 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)=54, x=54] [L100] RET, EXPR f(IN) VAL [f(IN)=49, IN=54] [L100] CALL, EXPR fp(IN) VAL [\old(x)=54] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=54, x=54] [L100] RET, EXPR fp(IN) VAL [f(IN)=49, fp(IN)=50, IN=54] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=52] [L87] 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)=52, x=52] [L102] RET, EXPR f(x) VAL [f(x)=51, IN=54, x=52] [L102] CALL, EXPR fp(x) VAL [\old(x)=52] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR fp(x) VAL [f(x)=51, fp(x)=53, IN=54, x=52] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=54] [L109] reach_error() VAL [IN=54] - 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 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 591 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 118 IncrementalHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 194 mSDtfsCounter, 118 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 14 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 17/41 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 could not prove your program: unable to determine feasibility of some traces [2021-12-17 20:16:20,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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/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/combinations/gcd_4+newton_2_8.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 131b2ae9424ecd75292a5889f04853eea3cca0c3e4c679243c4666d6f4003ffe --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:16:21,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:16:21,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:16:21,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:16:21,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:16:21,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:16:21,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:16:21,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:16:21,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:16:22,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:16:22,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:16:22,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:16:22,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:16:22,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:16:22,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:16:22,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:16:22,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:16:22,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:16:22,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:16:22,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:16:22,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:16:22,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:16:22,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:16:22,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:16:22,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:16:22,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:16:22,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:16:22,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:16:22,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:16:22,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:16:22,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:16:22,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:16:22,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:16:22,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:16:22,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:16:22,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:16:22,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:16:22,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:16:22,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:16:22,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:16:22,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:16:22,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 20:16:22,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:16:22,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:16:22,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:16:22,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:16:22,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:16:22,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:16:22,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:16:22,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:16:22,084 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:16:22,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:16:22,085 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:16:22,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:16:22,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:16:22,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:16:22,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:16:22,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:16:22,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:16:22,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:16:22,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:16:22,094 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 20:16:22,094 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 20:16:22,094 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:16:22,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:16:22,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:16:22,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:16:22,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 20:16:22,095 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:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 131b2ae9424ecd75292a5889f04853eea3cca0c3e4c679243c4666d6f4003ffe [2021-12-17 20:16:22,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:16:22,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:16:22,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:16:22,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:16:22,372 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:16:22,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_8.i [2021-12-17 20:16:22,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dc1abef/e9c57a3991054c65a372c39ee5014a9a/FLAGc37b05028 [2021-12-17 20:16:22,778 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:16:22,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_8.i [2021-12-17 20:16:22,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dc1abef/e9c57a3991054c65a372c39ee5014a9a/FLAGc37b05028 [2021-12-17 20:16:22,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77dc1abef/e9c57a3991054c65a372c39ee5014a9a [2021-12-17 20:16:22,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:16:22,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:16:22,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:16:22,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:16:22,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:16:22,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:16:22" (1/1) ... [2021-12-17 20:16:22,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ae4efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:22, skipping insertion in model container [2021-12-17 20:16:22,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:16:22" (1/1) ... [2021-12-17 20:16:22,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:16:22,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:16:22,929 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/combinations/gcd_4+newton_2_8.i[1224,1237] [2021-12-17 20:16:22,963 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/combinations/gcd_4+newton_2_8.i[2827,2840] [2021-12-17 20:16:22,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:16:23,010 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:16:23,021 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/combinations/gcd_4+newton_2_8.i[1224,1237] [2021-12-17 20:16:23,043 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/combinations/gcd_4+newton_2_8.i[2827,2840] [2021-12-17 20:16:23,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:16:23,053 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:16:23,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23 WrapperNode [2021-12-17 20:16:23,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:16:23,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:16:23,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:16:23,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:16:23,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,089 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2021-12-17 20:16:23,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:16:23,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:16:23,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:16:23,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:16:23,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:16:23,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:16:23,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:16:23,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:16:23,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (1/1) ... [2021-12-17 20:16:23,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:16:23,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:16:23,165 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) [2021-12-17 20:16:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:16:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 20:16:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-17 20:16:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-17 20:16:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-17 20:16:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-17 20:16:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:16:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:16:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 20:16:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 20:16:23,187 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 [2021-12-17 20:16:23,249 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:16:23,250 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:16:31,334 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:16:31,338 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:16:31,339 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 20:16:31,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:31 BoogieIcfgContainer [2021-12-17 20:16:31,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:16:31,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:16:31,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:16:31,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:16:31,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:16:22" (1/3) ... [2021-12-17 20:16:31,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52373160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:16:31, skipping insertion in model container [2021-12-17 20:16:31,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:16:23" (2/3) ... [2021-12-17 20:16:31,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52373160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:16:31, skipping insertion in model container [2021-12-17 20:16:31,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:31" (3/3) ... [2021-12-17 20:16:31,345 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_8.i [2021-12-17 20:16:31,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:16:31,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:16:31,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:16:31,379 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 [2021-12-17 20:16:31,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:16:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 20:16:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 20:16:31,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:31,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:31,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-17 20:16:31,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:16:31,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900805053] [2021-12-17 20:16:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:31,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:16:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:16:31,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:16:31,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 20:16:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:31,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 20:16:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:31,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 20:16:31,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 20:16:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900805053] [2021-12-17 20:16:31,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900805053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:31,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:31,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:31,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875309] [2021-12-17 20:16:31,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:31,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:31,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 20:16:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:31,655 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:31,741 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-17 20:16:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:31,743 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 20:16:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:31,747 INFO L225 Difference]: With dead ends: 93 [2021-12-17 20:16:31,747 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 20:16:31,749 INFO L932 BasicCegarLoop]: 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 [2021-12-17 20:16:31,751 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:31,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:16:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 20:16:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-17 20:16:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-17 20:16:31,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-17 20:16:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-17 20:16:31,775 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-17 20:16:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 20:16:31,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:31,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:31,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 20:16:31,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:16:31,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:31,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:31,991 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-17 20:16:31,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:16:31,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180166774] [2021-12-17 20:16:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:31,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:16:31,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:16:31,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:16:31,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 20:16:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 20:16:32,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:32,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 20:16:32,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 20:16:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180166774] [2021-12-17 20:16:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180166774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:32,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:32,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:32,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605084312] [2021-12-17 20:16:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:32,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:32,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 20:16:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:32,186 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:32,247 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-17 20:16:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 20:16:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:32,251 INFO L225 Difference]: With dead ends: 52 [2021-12-17 20:16:32,251 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 20:16:32,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:32,252 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:32,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:16:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 20:16:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 20:16:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-17 20:16:32,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-17 20:16:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-17 20:16:32,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-17 20:16:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 20:16:32,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:32,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:32,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 20:16:32,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:16:32,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-17 20:16:32,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:16:32,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258482266] [2021-12-17 20:16:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:32,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:16:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:16:32,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:16:32,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 20:16:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 20:16:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:32,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 20:16:32,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 20:16:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258482266] [2021-12-17 20:16:32,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258482266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:16:32,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:16:32,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:16:32,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561659064] [2021-12-17 20:16:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:16:32,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:16:32,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 20:16:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:16:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:32,812 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:32,887 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-17 20:16:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:16:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 20:16:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:32,889 INFO L225 Difference]: With dead ends: 53 [2021-12-17 20:16:32,889 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 20:16:32,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:16:32,890 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:32,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:16:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 20:16:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-17 20:16:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-17 20:16:32,894 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2021-12-17 20:16:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:32,894 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-17 20:16:32,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-17 20:16:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 20:16:32,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:32,895 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 20:16:33,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:16:33,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2021-12-17 20:16:33,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:16:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5226476] [2021-12-17 20:16:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:16:33,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:16:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:16:33,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:16:33,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 20:16:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:16:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 20:16:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:33,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:16:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:16:33,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 20:16:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5226476] [2021-12-17 20:16:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5226476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:16:33,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 20:16:33,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-17 20:16:33,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699689310] [2021-12-17 20:16:33,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 20:16:33,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:16:33,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 20:16:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:16:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:16:33,877 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:16:34,101 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-17 20:16:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:16:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-17 20:16:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:16:34,103 INFO L225 Difference]: With dead ends: 57 [2021-12-17 20:16:34,103 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 20:16:34,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:16:34,104 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 20:16:34,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 20:16:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 20:16:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 20:16:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 20:16:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-17 20:16:34,113 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2021-12-17 20:16:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:16:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-17 20:16:34,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:16:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-17 20:16:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 20:16:34,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:16:34,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:16:34,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 20:16:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:16:34,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:16:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:16:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-17 20:16:34,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:16:34,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809426335] [2021-12-17 20:16:34,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 20:16:34,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:16:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:16:34,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:16:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 20:16:34,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 20:16:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 20:16:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 20:16:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:16:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 20:16:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:16:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 20:16:42,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 20:16:42,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809426335] [2021-12-17 20:16:42,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809426335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:16:42,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 20:16:42,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-17 20:16:42,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86087360] [2021-12-17 20:16:42,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 20:16:42,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 20:16:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 20:16:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 20:16:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-17 20:16:42,841 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:17:11,478 WARN L227 SmtUtils]: Spent 7.21s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 20:17:26,142 WARN L227 SmtUtils]: Spent 8.87s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 20:17:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:17:29,318 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2021-12-17 20:17:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 20:17:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 20:17:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:17:29,351 INFO L225 Difference]: With dead ends: 68 [2021-12-17 20:17:29,351 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 20:17:29,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-12-17 20:17:29,352 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:17:29,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 376 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 20:17:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 20:17:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-17 20:17:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 20:17:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-17 20:17:29,358 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 21 [2021-12-17 20:17:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:17:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-17 20:17:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:17:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-17 20:17:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 20:17:29,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:17:29,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:17:29,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 20:17:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:17:29,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:17:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:17:29,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-12-17 20:17:29,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 20:17:29,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436531547] [2021-12-17 20:17:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:17:29,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 20:17:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 20:17:29,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 20:17:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 20:17:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 20:17:58,029 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 20:18:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 20:18:09,810 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-17 20:18:09,810 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 20:18:09,811 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 20:18:09,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 20:18:09,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 20:18:10,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 20:18:10,016 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-17 20:18:10,018 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 20:18:10,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:18:10 BoogieIcfgContainer [2021-12-17 20:18:10,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 20:18:10,038 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 20:18:10,038 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 20:18:10,038 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 20:18:10,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:16:31" (3/4) ... [2021-12-17 20:18:10,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 20:18:10,073 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 20:18:10,074 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 20:18:10,074 INFO L158 Benchmark]: Toolchain (without parser) took 107281.15ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 35.4MB in the beginning and 51.5MB in the end (delta: -16.1MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,074 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 20:18:10,075 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.56ms. Allocated memory is still 56.6MB. Free memory was 35.2MB in the beginning and 38.0MB in the end (delta: -2.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,075 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.75ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 36.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,075 INFO L158 Benchmark]: Boogie Preprocessor took 50.31ms. Allocated memory is still 56.6MB. Free memory was 36.2MB in the beginning and 34.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 20:18:10,075 INFO L158 Benchmark]: RCFGBuilder took 8199.01ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 34.8MB in the beginning and 51.4MB in the end (delta: -16.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,076 INFO L158 Benchmark]: TraceAbstraction took 98696.48ms. Allocated memory is still 71.3MB. Free memory was 51.1MB in the beginning and 26.7MB in the end (delta: 24.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,076 INFO L158 Benchmark]: Witness Printer took 35.81ms. Allocated memory is still 71.3MB. Free memory was 26.7MB in the beginning and 51.5MB in the end (delta: -24.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 20:18:10,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.56ms. Allocated memory is still 56.6MB. Free memory was 35.2MB in the beginning and 38.0MB in the end (delta: -2.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.75ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 36.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.31ms. Allocated memory is still 56.6MB. Free memory was 36.2MB in the beginning and 34.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 8199.01ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 34.8MB in the beginning and 51.4MB in the end (delta: -16.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * TraceAbstraction took 98696.48ms. Allocated memory is still 71.3MB. Free memory was 51.1MB in the beginning and 26.7MB in the end (delta: 24.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Witness Printer took 35.81ms. Allocated memory is still 71.3MB. Free memory was 26.7MB in the beginning and 51.5MB in the end (delta: -24.8MB). 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: 109]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L100] CALL, EXPR f(IN) VAL [\old(x)=-1.371921181678772] [L87] 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)=-1.371921181678772, \result=-0.9838727712631226, x=-1.371921181678772] [L100] RET, EXPR f(IN) VAL [f(IN)=-0.9838727712631226, IN=-1.371921181678772] [L100] CALL, EXPR fp(IN) VAL [\old(x)=-1.371921181678772] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=-1.371921181678772, \result=0.21578329801559448, x=-1.371921181678772] [L100] RET, EXPR fp(IN) VAL [f(IN)=-0.9838727712631226, fp(IN)=0.21578329801559448, IN=-1.371921181678772] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=3.187619686126709] [L87] 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)=3.187619686126709, \result=1.195448637008667, x=3.187619686126709] [L102] RET, EXPR f(x) VAL [f(x)=1.195448637008667, IN=-1.371921181678772, x=3.187619686126709] [L102] CALL, EXPR fp(x) VAL [\old(x)=3.187619686126709] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=3.187619686126709, \result=1.6784087419509888, x=3.187619686126709] [L102] RET, EXPR fp(x) VAL [f(x)=1.195448637008667, fp(x)=1.6784087419509888, IN=-1.371921181678772, x=3.187619686126709] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=-1.371921181678772, x=2.4753684997558594] [L109] reach_error() VAL [IN=-1.371921181678772, x=2.4753684997558594] - 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 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 98.6s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 47.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53 mSDsluCounter, 738 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 545 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 262 IncrementalHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 193 mSDtfsCounter, 262 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 48.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=5, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 28.6s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 477 SizeOfPredicates, 21 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 7/41 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! [2021-12-17 20:18:10,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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