./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_3+newton_2_5.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 b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:26:07,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:26:07,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:26:07,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:26:07,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:26:07,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:26:07,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:26:07,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:26:07,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:26:07,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:26:07,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:26:07,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:26:07,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:26:07,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:26:07,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:26:07,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:26:07,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:26:07,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:26:07,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:26:07,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:26:07,197 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:26:07,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:26:07,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:26:07,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:26:07,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:26:07,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:26:07,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:26:07,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:26:07,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:26:07,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:26:07,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:26:07,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:26:07,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:26:07,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:26:07,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:26:07,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:26:07,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:26:07,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:26:07,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:26:07,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:26:07,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:26:07,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:26:07,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:26:07,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:26:07,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:26:07,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:26:07,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:26:07,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:26:07,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:26:07,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:26:07,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:26:07,240 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:26:07,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:26:07,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:26:07,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:26:07,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:26:07,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:26:07,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:26:07,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:26:07,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:26:07,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:26:07,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:26:07,243 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:26:07,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:26:07,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:26:07,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:26:07,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:26:07,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:26:07,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:26:07,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:26:07,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:26:07,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:26:07,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:26:07,245 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:26:07,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:26:07,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:26:07,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba [2022-07-13 20:26:07,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:26:07,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:26:07,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:26:07,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:26:07,483 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:26:07,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-07-13 20:26:07,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b770da9aa/a02ab4e674b34ffa801ba1ea7d1545ce/FLAGbbfa08a2c [2022-07-13 20:26:07,931 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:26:07,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-07-13 20:26:07,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b770da9aa/a02ab4e674b34ffa801ba1ea7d1545ce/FLAGbbfa08a2c [2022-07-13 20:26:07,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b770da9aa/a02ab4e674b34ffa801ba1ea7d1545ce [2022-07-13 20:26:07,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:26:07,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:26:07,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:26:07,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:26:07,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:26:07,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:26:07" (1/1) ... [2022-07-13 20:26:07,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5d59d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:07, skipping insertion in model container [2022-07-13 20:26:07,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:26:07" (1/1) ... [2022-07-13 20:26:07,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:26:07,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:26:08,105 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_3+newton_2_5.i[1226,1239] [2022-07-13 20:26:08,121 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_3+newton_2_5.i[2841,2854] [2022-07-13 20:26:08,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:26:08,127 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:26:08,135 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_3+newton_2_5.i[1226,1239] [2022-07-13 20:26:08,142 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_3+newton_2_5.i[2841,2854] [2022-07-13 20:26:08,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:26:08,152 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:26:08,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08 WrapperNode [2022-07-13 20:26:08,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:26:08,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:26:08,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:26:08,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:26:08,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,197 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-13 20:26:08,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:26:08,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:26:08,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:26:08,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:26:08,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:26:08,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:26:08,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:26:08,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:26:08,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (1/1) ... [2022-07-13 20:26:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:26:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:26:08,240 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) [2022-07-13 20:26:08,242 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 [2022-07-13 20:26:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:26:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-13 20:26:08,284 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-13 20:26:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-13 20:26:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-13 20:26:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:26:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:26:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:26:08,340 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:26:08,342 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:26:08,562 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:26:08,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:26:08,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 20:26:08,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:26:08 BoogieIcfgContainer [2022-07-13 20:26:08,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:26:08,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:26:08,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:26:08,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:26:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:26:07" (1/3) ... [2022-07-13 20:26:08,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d05af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:26:08, skipping insertion in model container [2022-07-13 20:26:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:26:08" (2/3) ... [2022-07-13 20:26:08,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d05af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:26:08, skipping insertion in model container [2022-07-13 20:26:08,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:26:08" (3/3) ... [2022-07-13 20:26:08,575 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_5.i [2022-07-13 20:26:08,585 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:26:08,586 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:26:08,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:26:08,648 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4480d648, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@332b6689 [2022-07-13 20:26:08,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:26:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 20:26:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:26:08,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:26:08,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:26:08,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:26:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:26:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-13 20:26:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:26:08,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549035332] [2022-07-13 20:26:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:26:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:26:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:26:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:26:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:26:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549035332] [2022-07-13 20:26:08,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549035332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:26:08,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:26:08,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 20:26:08,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377436598] [2022-07-13 20:26:08,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:26:08,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 20:26:08,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:26:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 20:26:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:26:08,871 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 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:26:08,941 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-13 20:26:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 20:26:08,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 20:26:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:26:08,950 INFO L225 Difference]: With dead ends: 90 [2022-07-13 20:26:08,951 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 20:26:08,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:26:08,958 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:26:08,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:26:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 20:26:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-13 20:26:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 20:26:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-13 20:26:08,987 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-13 20:26:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:26:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-13 20:26:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-13 20:26:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:26:08,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:26:08,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:26:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:26:08,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:26:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:26:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-13 20:26:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:26:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113445170] [2022-07-13 20:26:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:26:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:26:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:26:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:26:09,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:26:09,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113445170] [2022-07-13 20:26:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113445170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:26:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:26:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:26:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133221708] [2022-07-13 20:26:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:26:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:26:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:26:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:26:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:26:09,067 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:26:09,143 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-13 20:26:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:26:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 20:26:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:26:09,144 INFO L225 Difference]: With dead ends: 36 [2022-07-13 20:26:09,144 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 20:26:09,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:26:09,145 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:26:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:26:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 20:26:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 20:26:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 20:26:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-13 20:26:09,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-13 20:26:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:26:09,149 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-13 20:26:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-13 20:26:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 20:26:09,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:26:09,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:26:09,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:26:09,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:26:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:26:09,151 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-13 20:26:09,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:26:09,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689854232] [2022-07-13 20:26:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:26:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:26:09,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:26:09,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611127549] [2022-07-13 20:26:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:26:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:26:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:26:09,164 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) [2022-07-13 20:26:09,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:26:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:26:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 20:26:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:26:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:26:34,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:26:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:26:38,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:26:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689854232] [2022-07-13 20:26:38,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:26:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611127549] [2022-07-13 20:26:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611127549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:26:38,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:26:38,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-13 20:26:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985980441] [2022-07-13 20:26:38,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:26:38,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 20:26:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:26:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 20:26:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=210, Unknown=8, NotChecked=0, Total=272 [2022-07-13 20:26:38,979 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:26:41,487 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-13 20:26:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 20:26:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-13 20:26:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:26:41,488 INFO L225 Difference]: With dead ends: 42 [2022-07-13 20:26:41,488 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 20:26:41,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=74, Invalid=260, Unknown=8, NotChecked=0, Total=342 [2022-07-13 20:26:41,490 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:26:41,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-13 20:26:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 20:26:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-07-13 20:26:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 20:26:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-13 20:26:41,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-13 20:26:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:26:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-13 20:26:41,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:26:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-13 20:26:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 20:26:41,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:26:41,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:26:41,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 20:26:41,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:26:41,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:26:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:26:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2022-07-13 20:26:41,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:26:41,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248367322] [2022-07-13 20:26:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:26:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:26:41,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:26:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271540474] [2022-07-13 20:26:41,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 20:26:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:26:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:26:41,730 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) [2022-07-13 20:26:41,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:26:41,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 20:26:41,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:26:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 20:26:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:27:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:27:01,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:28:34,849 WARN L833 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (or (= |ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse9 (< |ULTIMATE.start_gcd_test_~b#1| 0)) (.cse17 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (let ((.cse14 (mod .cse12 256)) (.cse16 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (.cse0 (not (<= .cse17 127))) (.cse1 (not .cse9)) (.cse3 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0))) (.cse4 (not .cse13)) (.cse5 (<= .cse17 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse8 (or .cse0 .cse1 .cse3 .cse4 .cse5)) (.cse10 (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse11 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0))) (.cse7 (not (<= .cse16 127))) (.cse15 (<= .cse14 127))) (and (or (let ((.cse6 (or .cse13 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0)) (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|))) (.cse2 (= .cse12 0))) (and (or .cse0 (and (or .cse1 .cse2 .cse3 .cse4 .cse5) .cse6)) .cse6 (or .cse7 (and .cse8 .cse6 (or .cse9 (and .cse6 (or .cse10 .cse11 .cse2 .cse4))))))) (not .cse15)) (or (and .cse8 (or .cse10 .cse9 .cse11 .cse7 .cse4)) .cse15))))))))) is different from false [2022-07-13 20:29:07,761 WARN L833 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (or (= |ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse7 (mod .cse12 256)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse14 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (.cse9 (< |ULTIMATE.start_gcd_test_~b#1| 0)) (.cse15 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (let ((.cse0 (not (<= .cse15 127))) (.cse1 (not .cse9)) (.cse3 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse15) 256) 0))) (.cse5 (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse10 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0))) (.cse11 (not (<= .cse14 127))) (.cse4 (not .cse6)) (.cse13 (<= .cse7 127))) (and (or (let ((.cse2 (= .cse12 0))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (or .cse6 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 0)) (<= .cse7 |c_ULTIMATE.start_main1_~x~0#1|)) (or .cse8 .cse9 .cse10 .cse2 .cse11 .cse4))) (not .cse13)) (or (and (or .cse0 .cse1 .cse3 .cse4 .cse5) (or .cse8 .cse9 .cse10 .cse11 .cse4)) .cse13)))))))) is different from false [2022-07-13 20:29:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 20:29:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:29:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248367322] [2022-07-13 20:29:13,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:29:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271540474] [2022-07-13 20:29:13,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271540474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:29:13,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:29:13,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-13 20:29:13,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427185334] [2022-07-13 20:29:13,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:29:13,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:29:13,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:29:13,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:29:13,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=187, Unknown=6, NotChecked=58, Total=306 [2022-07-13 20:29:13,340 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:29:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:29:14,526 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-13 20:29:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 20:29:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 20:29:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:29:14,527 INFO L225 Difference]: With dead ends: 42 [2022-07-13 20:29:14,527 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 20:29:14,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=55, Invalid=187, Unknown=6, NotChecked=58, Total=306 [2022-07-13 20:29:14,528 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 20:29:14,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 264 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-07-13 20:29:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 20:29:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-13 20:29:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 20:29:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-13 20:29:14,533 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-07-13 20:29:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:29:14,534 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-13 20:29:14,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:29:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-13 20:29:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 20:29:14,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:29:14,534 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:29:14,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 20:29:14,743 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,SelfDestructingSolverStorable3 [2022-07-13 20:29:14,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:29:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:29:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1767906835, now seen corresponding path program 3 times [2022-07-13 20:29:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:29:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922591171] [2022-07-13 20:29:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:29:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:29:14,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:29:14,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435435017] [2022-07-13 20:29:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 20:29:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:29:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:29:14,760 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) [2022-07-13 20:29:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:29:14,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 20:29:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:29:14,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 20:29:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:30:05,806 WARN L233 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 55 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 20:30:31,976 WARN L833 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse1 (mod (mod .cse4 .cse0) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse0 .cse1) 256)) (let ((.cse2 (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256))) (let ((.cse3 (<= .cse2 127))) (or (and (= (+ (- 256) .cse2) |c_ULTIMATE.start_gcd_test_~b#1|) (not .cse3)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| .cse2) .cse3)))) (not (= .cse1 0)) (not (= .cse0 0)) (<= .cse4 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse13 (+ (- 256) .cse5))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (let ((.cse10 (+ (mod (+ (* 255 .cse11) .cse12) 256) (- 256)))) (and (not (<= .cse5 127)) (let ((.cse7 (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse6 (= .cse7 0))) (or (and .cse6 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256))) (and (let ((.cse8 (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse7) 256))) (let ((.cse9 (<= .cse8 127))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| .cse8) .cse9) (and (not .cse9) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse8)))))) (not .cse6))))) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse11 .cse10) 256)) (not (= .cse12 0)) (not (= .cse11 0)))))))))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) is different from false