./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_1+newton_2_6.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 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:08:49,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:08:49,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:08:49,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:08:49,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:08:49,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:08:49,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:08:49,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:08:49,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:08:49,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:08:49,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:08:49,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:08:49,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:08:49,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:08:49,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:08:49,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:08:49,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:08:49,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:08:49,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:08:49,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:08:49,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:08:49,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:08:49,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:08:49,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:08:49,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:08:49,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:08:49,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:08:49,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:08:49,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:08:49,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:08:49,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:08:49,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:08:49,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:08:49,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:08:49,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:08:49,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:08:49,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:08:49,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:08:49,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:08:49,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:08:49,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:08:49,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:08:49,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:08:49,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:08:49,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:08:49,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:08:49,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:08:49,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:08:49,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:08:49,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:08:49,432 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:08:49,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:08:49,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:08:49,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:08:49,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:08:49,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:08:49,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:08:49,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:08:49,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:08:49,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:08:49,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:08:49,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:08:49,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:08:49,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:08:49,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:08:49,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f [2021-12-17 19:08:49,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:08:49,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:08:49,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:08:49,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:08:49,631 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:08:49,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2021-12-17 19:08:49,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af9d64d1/9cc600a288ed4e4fbcebaffd9dc91aa1/FLAG7bea1241f [2021-12-17 19:08:50,028 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:08:50,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2021-12-17 19:08:50,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af9d64d1/9cc600a288ed4e4fbcebaffd9dc91aa1/FLAG7bea1241f [2021-12-17 19:08:50,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af9d64d1/9cc600a288ed4e4fbcebaffd9dc91aa1 [2021-12-17 19:08:50,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:08:50,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:08:50,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:08:50,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:08:50,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:08:50,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f21cdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50, skipping insertion in model container [2021-12-17 19:08:50,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:08:50,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:08:50,236 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_1+newton_2_6.i[1226,1239] [2021-12-17 19:08:50,272 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_1+newton_2_6.i[2807,2820] [2021-12-17 19:08:50,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:08:50,280 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:08:50,293 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_1+newton_2_6.i[1226,1239] [2021-12-17 19:08:50,316 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_1+newton_2_6.i[2807,2820] [2021-12-17 19:08:50,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:08:50,327 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:08:50,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50 WrapperNode [2021-12-17 19:08:50,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:08:50,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:08:50,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:08:50,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:08:50,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,367 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-17 19:08:50,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:08:50,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:08:50,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:08:50,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:08:50,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:08:50,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:08:50,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:08:50,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:08:50,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (1/1) ... [2021-12-17 19:08:50,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:08:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:08:50,426 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 19:08:50,446 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 19:08:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:08:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-17 19:08:50,471 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-17 19:08:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-17 19:08:50,471 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-17 19:08:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:08:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:08:50,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:08:50,519 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:08:50,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:08:50,630 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:08:50,634 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:08:50,639 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 19:08:50,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:08:50 BoogieIcfgContainer [2021-12-17 19:08:50,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:08:50,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:08:50,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:08:50,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:08:50,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:08:50" (1/3) ... [2021-12-17 19:08:50,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17791598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:08:50, skipping insertion in model container [2021-12-17 19:08:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:08:50" (2/3) ... [2021-12-17 19:08:50,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17791598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:08:50, skipping insertion in model container [2021-12-17 19:08:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:08:50" (3/3) ... [2021-12-17 19:08:50,660 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_6.i [2021-12-17 19:08:50,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:08:50,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:08:50,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:08:50,712 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 19:08:50,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:08:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:08:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:08:50,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:08:50,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:08:50,740 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:08:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:08:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-12-17 19:08:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:08:50,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675331969] [2021-12-17 19:08:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:50,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:08:50,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:08:50,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006756856] [2021-12-17 19:08:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:50,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:08:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:08:50,832 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 19:08:50,855 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 19:08:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:08:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 19:08:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:08:50,945 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 19:08:50,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:08:50,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:08:50,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675331969] [2021-12-17 19:08:50,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:08:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006756856] [2021-12-17 19:08:50,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006756856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:08:50,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:08:50,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 19:08:50,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354118647] [2021-12-17 19:08:50,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:08:50,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 19:08:50,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:08:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 19:08:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 19:08:50,978 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:08:50,995 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-12-17 19:08:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 19:08:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 19:08:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:08:51,001 INFO L225 Difference]: With dead ends: 66 [2021-12-17 19:08:51,002 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 19:08:51,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 19:08:51,008 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:08:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:08:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 19:08:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 19:08:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:08:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-17 19:08:51,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-12-17 19:08:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:08:51,039 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-17 19:08:51,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-17 19:08:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:08:51,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:08:51,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:08:51,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:08:51,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-17 19:08:51,250 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:08:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:08:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-12-17 19:08:51,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:08:51,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179749833] [2021-12-17 19:08:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:51,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:08:51,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:08:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628444726] [2021-12-17 19:08:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:51,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:08:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:08:51,259 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 19:08:51,260 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 19:08:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:08:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 19:08:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:08:51,365 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 19:08:51,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:08:51,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:08:51,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179749833] [2021-12-17 19:08:51,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:08:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628444726] [2021-12-17 19:08:51,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628444726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:08:51,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:08:51,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 19:08:51,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346030185] [2021-12-17 19:08:51,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:08:51,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:08:51,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:08:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:08:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 19:08:51,371 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:08:51,394 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-17 19:08:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:08:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 19:08:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:08:51,395 INFO L225 Difference]: With dead ends: 36 [2021-12-17 19:08:51,395 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 19:08:51,396 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 19:08:51,398 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:08:51,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:08:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 19:08:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-17 19:08:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:08:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-17 19:08:51,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-17 19:08:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:08:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-17 19:08:51,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-17 19:08:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 19:08:51,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:08:51,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:08:51,422 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 19:08:51,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-17 19:08:51,621 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:08:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:08:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-12-17 19:08:51,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:08:51,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50980164] [2021-12-17 19:08:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:51,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:08:51,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:08:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637715572] [2021-12-17 19:08:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:08:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:08:51,632 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 19:08:51,651 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 19:08:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:08:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 19:08:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:08:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:08:51,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:08:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:08:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:08:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50980164] [2021-12-17 19:08:51,758 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:08:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637715572] [2021-12-17 19:08:51,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637715572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:08:51,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:08:51,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-17 19:08:51,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81689279] [2021-12-17 19:08:51,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:08:51,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:08:51,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:08:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:08:51,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:08:51,760 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:08:51,804 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-17 19:08:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:08:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 19:08:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:08:51,805 INFO L225 Difference]: With dead ends: 36 [2021-12-17 19:08:51,805 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 19:08:51,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:08:51,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:08:51,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:08:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 19:08:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 19:08:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:08:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-17 19:08:51,809 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-17 19:08:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:08:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-17 19:08:51,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:08:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-17 19:08:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 19:08:51,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:08:51,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:08:51,830 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 19:08:52,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:08:52,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:08:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:08:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-12-17 19:08:52,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:08:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381927398] [2021-12-17 19:08:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:08:52,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:08:52,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:08:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790537264] [2021-12-17 19:08:52,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 19:08:52,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:08:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:08:52,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:08:52,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:08:56,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 19:08:56,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:08:56,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 19:08:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:09:54,382 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:10:07,190 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:10:27,079 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (and (not (= 0 .cse0)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (= |c_ULTIMATE.start_gcd_test_#res#1| .cse0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))))) is different from false [2021-12-17 19:11:47,268 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main1_~y~0#1|) (not (= 0 .cse0)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (= 0 (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main1_~y~0#1|))))) (<= 0 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|)) is different from false [2021-12-17 19:12:30,351 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main1_~y~0#1|) (not (= 0 .cse0)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (= 0 (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main1_~y~0#1|))))) is different from false [2021-12-17 19:12:32,355 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main1_~y~0#1|) (not (= 0 .cse0)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (= 0 (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main1_~y~0#1|))))) is different from true [2021-12-17 19:12:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 19:12:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:15:03,008 WARN L227 SmtUtils]: Spent 2.04m on a formula simplification. DAG size of input: 92 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:15:23,755 WARN L227 SmtUtils]: Spent 9.82s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:16:04,022 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256))) (< 127 .cse1) (= 0 .cse0))) (let ((.cse2 (mod (+ .cse1 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256))) (= 0 .cse2))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|)))) is different from true [2021-12-17 19:16:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:16:17,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:16:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381927398] [2021-12-17 19:16:17,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:16:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790537264] [2021-12-17 19:16:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790537264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:16:17,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:16:17,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-17 19:16:17,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533562066] [2021-12-17 19:16:17,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:16:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 19:16:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:16:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 19:16:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=144, Unknown=15, NotChecked=174, Total=380 [2021-12-17 19:16:17,808 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:17:12,785 WARN L227 SmtUtils]: Spent 47.09s on a formula simplification. DAG size of input: 44 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:17:15,303 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) (.cse1 (+ |c_ULTIMATE.start_main1_~y~0#1| 256)) (.cse9 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (let ((.cse4 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (let ((.cse2 (mod (+ .cse4 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (let ((.cse0 (mod (+ .cse2 .cse3) 256))) (and (or (= 0 .cse0) (< 127 .cse0) (= .cse0 |c_ULTIMATE.start_main1_~y~0#1|)) (or (= .cse0 .cse1) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse0 (- 256))) 256))) (<= .cse0 127)))) (= 0 .cse2) (<= .cse4 127))) (or (< 127 .cse4) (let ((.cse5 (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (and (or (< 127 .cse5) (= 0 .cse5) (= .cse5 |c_ULTIMATE.start_main1_~y~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse5) 256)))) (or (<= .cse5 127) (= .cse5 .cse1))))))) .cse6 .cse7) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (or (= 0 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|)) .cse6) (or (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (let ((.cse8 (mod .cse9 256))) (and (or (< 127 .cse8) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse8) 256))) (= 0 .cse8) (= .cse8 |c_ULTIMATE.start_main1_~y~0#1|)) (or (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse8 (- 256))) 256))) (<= .cse8 127) (= .cse8 .cse1))))) (or (= 0 .cse9) .cse6 (let ((.cse17 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse18 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse9) 256))) (let ((.cse12 (or .cse17 (= .cse18 |c_ULTIMATE.start_main1_~y~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256))) (= 0 .cse18))) (.cse10 (< 127 .cse18)) (.cse13 (<= .cse18 127)) (.cse14 (or .cse17 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse18 (- 256))) 256))) (= .cse18 .cse1))) (.cse15 (mod (+ .cse3 .cse9) 256))) (and (or (let ((.cse11 (or (= .cse15 .cse1) .cse7 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse15 (- 256))) 256)))))) (and (or .cse10 (and .cse11 .cse12)) (or .cse13 (and .cse14 .cse11)))) (<= .cse15 127)) (or (let ((.cse16 (or (= 0 .cse15) (= .cse15 |c_ULTIMATE.start_main1_~y~0#1|) .cse7 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse15) 256)))))) (and (or (and .cse16 .cse12) .cse10) (or .cse13 (and .cse14 .cse16)))) (< 127 .cse15)))))) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|))) is different from false [2021-12-17 19:18:15,493 WARN L227 SmtUtils]: Spent 45.15s on a formula simplification. DAG size of input: 79 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:19:25,202 WARN L227 SmtUtils]: Spent 52.96s on a formula simplification. DAG size of input: 108 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:20:05,703 WARN L227 SmtUtils]: Spent 35.78s on a formula simplification. DAG size of input: 43 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:20:07,708 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (or (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:20:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:20:08,332 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-17 19:20:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 19:20:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 19:20:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:20:08,333 INFO L225 Difference]: With dead ends: 40 [2021-12-17 19:20:08,333 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 19:20:08,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 408.7s TimeCoverageRelationStatistics Valid=78, Invalid=231, Unknown=29, NotChecked=312, Total=650 [2021-12-17 19:20:08,334 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 19:20:08,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 351 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 81 Unchecked, 1.2s Time] [2021-12-17 19:20:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 19:20:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-17 19:20:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:20:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-17 19:20:08,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2021-12-17 19:20:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:20:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-17 19:20:08,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:20:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-17 19:20:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 19:20:08,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:20:08,338 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:20:08,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 19:20:08,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:20:08,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:20:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:20:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2021-12-17 19:20:08,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:20:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404939300] [2021-12-17 19:20:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:20:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:20:08,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:20:08,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89653020] [2021-12-17 19:20:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:20:08,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:20:08,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:20:08,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:20:08,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 19:20:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:20:08,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 19:20:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:20:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:20:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:21:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:21:17,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:21:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404939300] [2021-12-17 19:21:17,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:21:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89653020] [2021-12-17 19:21:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89653020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:21:17,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:21:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2021-12-17 19:21:17,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266883728] [2021-12-17 19:21:17,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:21:17,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 19:21:17,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:21:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 19:21:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:21:17,978 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:21:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:21:18,665 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-12-17 19:21:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:21:18,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 19:21:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:21:18,666 INFO L225 Difference]: With dead ends: 41 [2021-12-17 19:21:18,666 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 19:21:18,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:21:18,667 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:21:18,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 174 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 14 Unchecked, 0.7s Time] [2021-12-17 19:21:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 19:21:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-17 19:21:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 19:21:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-17 19:21:18,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 13 [2021-12-17 19:21:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:21:18,670 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-17 19:21:18,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:21:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-17 19:21:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 19:21:18,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:21:18,671 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:21:18,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 19:21:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:21:18,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:21:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:21:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash 66034544, now seen corresponding path program 3 times [2021-12-17 19:21:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:21:18,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925277921] [2021-12-17 19:21:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:21:18,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:21:18,887 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:21:18,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835852806] [2021-12-17 19:21:18,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 19:21:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:21:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:21:18,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:21:18,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 19:21:36,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 19:21:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:21:36,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 19:21:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:23:21,832 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| Int) (|v_ULTIMATE.start_gcd_test_~a#1_26| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_24| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_26|) 256))) (and (not (= 0 .cse0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_26| .cse0) 256)) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_24| |v_ULTIMATE.start_gcd_test_~a#1_26|)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_26|) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (< |v_ULTIMATE.start_gcd_test_~a#1_24| 0) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_24| 128))))) is different from false Killed by 15