./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/gcd_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:18:46,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:18:46,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:18:46,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:18:46,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:18:46,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:18:46,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:18:46,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:18:46,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:18:46,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:18:46,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:18:46,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:18:46,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:18:46,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:18:46,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:18:46,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:18:46,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:18:46,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:18:46,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:18:46,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:18:46,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:18:46,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:18:46,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:18:46,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:18:46,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:18:46,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:18:46,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:18:46,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:18:46,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:18:46,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:18:46,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:18:46,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:18:46,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:18:46,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:18:46,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:18:46,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:18:46,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:18:46,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:18:46,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:18:46,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:18:46,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:18:46,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:18:46,671 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:18:46,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:18:46,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:18:46,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:18:46,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:18:46,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:18:46,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:18:46,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:18:46,673 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:18:46,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:18:46,674 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:18:46,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:18:46,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:18:46,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:18:46,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:18:46,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:18:46,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:18:46,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:18:46,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:18:46,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:18:46,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:18:46,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:18:46,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:18:46,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:18:46,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:18:46,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:18:46,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:18:46,677 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:18:46,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:18:46,678 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:18:46,678 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde [2023-02-15 19:18:46,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:18:46,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:18:46,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:18:46,895 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:18:46,895 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:18:46,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_1.c [2023-02-15 19:18:47,836 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:18:47,997 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:18:47,998 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c [2023-02-15 19:18:48,002 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2285100/d61ad25f258a4c3d88db9528c135477e/FLAG00d982c74 [2023-02-15 19:18:48,012 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2285100/d61ad25f258a4c3d88db9528c135477e [2023-02-15 19:18:48,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:18:48,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:18:48,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:18:48,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:18:48,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:18:48,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cc27f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48, skipping insertion in model container [2023-02-15 19:18:48,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:18:48,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:18:48,115 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2023-02-15 19:18:48,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:18:48,129 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:18:48,136 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2023-02-15 19:18:48,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:18:48,146 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:18:48,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48 WrapperNode [2023-02-15 19:18:48,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:18:48,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:18:48,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:18:48,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:18:48,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,171 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2023-02-15 19:18:48,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:18:48,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:18:48,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:18:48,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:18:48,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:18:48,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:18:48,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:18:48,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:18:48,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (1/1) ... [2023-02-15 19:18:48,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:18:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:18:48,209 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) [2023-02-15 19:18:48,210 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 [2023-02-15 19:18:48,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:18:48,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:18:48,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:18:48,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:18:48,268 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:18:48,270 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:18:48,420 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:18:48,424 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:18:48,424 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 19:18:48,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:18:48 BoogieIcfgContainer [2023-02-15 19:18:48,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:18:48,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:18:48,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:18:48,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:18:48,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:18:48" (1/3) ... [2023-02-15 19:18:48,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12baa2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:18:48, skipping insertion in model container [2023-02-15 19:18:48,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:18:48" (2/3) ... [2023-02-15 19:18:48,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12baa2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:18:48, skipping insertion in model container [2023-02-15 19:18:48,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:18:48" (3/3) ... [2023-02-15 19:18:48,430 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2023-02-15 19:18:48,463 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:18:48,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:18:48,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:18:48,547 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@136f8ff9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:18:48,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:18:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 19:18:48,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:18:48,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:18:48,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:18:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:18:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2002478831, now seen corresponding path program 1 times [2023-02-15 19:18:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:18:48,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884839462] [2023-02-15 19:18:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:18:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:18:48,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:18:48,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253248291] [2023-02-15 19:18:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:18:48,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:18:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:18:48,647 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) [2023-02-15 19:18:48,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:18:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:18:48,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 19:18:48,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:18:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:18:48,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:18:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:18:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884839462] [2023-02-15 19:18:48,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:18:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253248291] [2023-02-15 19:18:48,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253248291] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:18:48,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:18:48,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:18:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841669241] [2023-02-15 19:18:48,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:18:48,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:18:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:18:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:18:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:18:48,847 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:18:48,867 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-02-15 19:18:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:18:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 19:18:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:18:48,875 INFO L225 Difference]: With dead ends: 28 [2023-02-15 19:18:48,875 INFO L226 Difference]: Without dead ends: 12 [2023-02-15 19:18:48,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:18:48,881 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:18:48,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:18:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-15 19:18:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-15 19:18:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-15 19:18:48,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2023-02-15 19:18:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:18:48,900 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-15 19:18:48,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-15 19:18:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:18:48,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:18:48,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:18:48,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:18:49,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 19:18:49,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:18:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:18:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1895646932, now seen corresponding path program 1 times [2023-02-15 19:18:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:18:49,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023935737] [2023-02-15 19:18:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:18:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:18:49,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:18:49,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932038440] [2023-02-15 19:18:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:18:49,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:18:49,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:18:49,127 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) [2023-02-15 19:18:49,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:18:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:18:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 19:18:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:18:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:18:49,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:18:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:18:49,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:18:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023935737] [2023-02-15 19:18:49,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:18:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932038440] [2023-02-15 19:18:49,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932038440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:18:49,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:18:49,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 19:18:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552345812] [2023-02-15 19:18:49,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:18:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:18:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:18:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:18:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:18:49,255 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:18:49,303 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2023-02-15 19:18:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:18:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 19:18:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:18:49,308 INFO L225 Difference]: With dead ends: 18 [2023-02-15 19:18:49,308 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 19:18:49,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:18:49,310 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:18:49,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:18:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 19:18:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 19:18:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-15 19:18:49,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-02-15 19:18:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:18:49,316 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-15 19:18:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:18:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-15 19:18:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 19:18:49,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:18:49,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:18:49,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 19:18:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 19:18:49,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:18:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:18:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1416141937, now seen corresponding path program 2 times [2023-02-15 19:18:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:18:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132869468] [2023-02-15 19:18:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:18:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:18:49,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:18:49,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309886312] [2023-02-15 19:18:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:18:49,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:18:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:18:49,545 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) [2023-02-15 19:18:49,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:18:52,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:18:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:18:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 19:18:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:19:32,142 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 10 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-02-15 19:19:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:19:34,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:19:45,943 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse11 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (= 0 .cse11)) (.cse13 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse9 (not .cse5))) (and (or (let ((.cse10 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse11) 256))) (let ((.cse6 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse11) 256)) (.cse0 (<= .cse10 127))) (let ((.cse2 (or .cse9 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse10 (- 256))) 256))))) (.cse3 (or .cse9 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse10) 256))) (= 0 .cse10))) (.cse4 (not .cse0)) (.cse7 (<= .cse6 127))) (and (or (let ((.cse1 (or .cse5 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse6 (- 256))) 256)))))) (and (or .cse0 (and .cse1 .cse2)) (or (and .cse3 .cse1) .cse4))) .cse7) (or (let ((.cse8 (or .cse5 (= 0 .cse6) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse6) 256)))))) (and (or .cse0 (and .cse8 .cse2)) (or (and .cse8 .cse3) .cse4))) (not .cse7)))))) .cse12 (not .cse13)) (or (and (not .cse12) .cse13) (let ((.cse15 (mod .cse11 256))) (let ((.cse14 (<= .cse15 127))) (and (or .cse14 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse15 (- 256))) 256)))) (or (not .cse14) (let ((.cse16 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse15) 256)))) (.cse17 (= 0 .cse15))) (and (or .cse16 .cse17 .cse9) (or .cse16 .cse17 .cse5))))))))))) (= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from true [2023-02-15 19:20:26,824 WARN L233 SmtUtils]: Spent 28.93s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 19:21:02,197 WARN L859 $PredicateComparison]: unable to prove that (or (<= 0 |c_ULTIMATE.start_main_~x~0#1|) (not (= 0 (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (< 0 |c_ULTIMATE.start_main_~y~0#1|)) (let ((.cse2 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main_~y~0#1|))) (or .cse0 (= 0 .cse1) (not (= 0 (mod (mod |c_ULTIMATE.start_main_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse1) 256) (- 256))) 256))))) (let ((.cse3 (mod (mod .cse2 |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (= 0 .cse3) (not (= 0 (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse3) 256))) (not .cse0))))))) is different from true [2023-02-15 19:21:45,282 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|))) (not (< 0 |v_ULTIMATE.start_main_~y~0#1_6|)) (not (<= 0 (+ |v_ULTIMATE.start_main_~x~0#1_5| 128))) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= 0 (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256))) (= 0 .cse0)))) is different from false [2023-02-15 19:21:47,284 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|))) (not (< 0 |v_ULTIMATE.start_main_~y~0#1_6|)) (not (<= 0 (+ |v_ULTIMATE.start_main_~x~0#1_5| 128))) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= 0 (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256))) (= 0 .cse0)))) is different from true [2023-02-15 19:21:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 19:21:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132869468] [2023-02-15 19:21:47,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:21:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309886312] [2023-02-15 19:21:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309886312] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:47,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:47,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2023-02-15 19:21:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278484659] [2023-02-15 19:21:47,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:47,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:21:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:21:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=99, Unknown=10, NotChecked=66, Total=210 [2023-02-15 19:21:47,287 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:23:04,390 WARN L233 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 44 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)