./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 19:49:59,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 19:49:59,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 19:49:59,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 19:49:59,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 19:49:59,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 19:49:59,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 19:49:59,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 19:49:59,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 19:49:59,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 19:49:59,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 19:49:59,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 19:49:59,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 19:49:59,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 19:49:59,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 19:49:59,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 19:49:59,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 19:49:59,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 19:49:59,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 19:49:59,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 19:49:59,179 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 19:49:59,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 19:49:59,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 19:49:59,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 19:49:59,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 19:49:59,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 19:49:59,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 19:49:59,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 19:49:59,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 19:49:59,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 19:49:59,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 19:49:59,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 19:49:59,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 19:49:59,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 19:49:59,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 19:49:59,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 19:49:59,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 19:49:59,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 19:49:59,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 19:49:59,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 19:49:59,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 19:49:59,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 19:49:59,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 19:49:59,229 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 19:49:59,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 19:49:59,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 19:49:59,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 19:49:59,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 19:49:59,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 19:49:59,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 19:49:59,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 19:49:59,232 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 19:49:59,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 19:49:59,232 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 19:49:59,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 19:49:59,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 19:49:59,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 19:49:59,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 19:49:59,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 19:49:59,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 19:49:59,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 19:49:59,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:49:59,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 19:49:59,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 19:49:59,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2022-07-19 19:49:59,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 19:49:59,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 19:49:59,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 19:49:59,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 19:49:59,450 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 19:49:59,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-07-19 19:49:59,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a082a1f/c50a42fcb06f4f71b3536f13e65c02fe/FLAGe716cf393 [2022-07-19 19:49:59,894 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 19:49:59,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-07-19 19:49:59,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a082a1f/c50a42fcb06f4f71b3536f13e65c02fe/FLAGe716cf393 [2022-07-19 19:49:59,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a082a1f/c50a42fcb06f4f71b3536f13e65c02fe [2022-07-19 19:49:59,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 19:49:59,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 19:49:59,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 19:49:59,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 19:49:59,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 19:49:59,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:49:59" (1/1) ... [2022-07-19 19:49:59,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb22eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:49:59, skipping insertion in model container [2022-07-19 19:49:59,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:49:59" (1/1) ... [2022-07-19 19:49:59,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 19:49:59,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 19:50:00,109 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_6.i[1226,1239] [2022-07-19 19:50:00,145 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_6.i[2841,2854] [2022-07-19 19:50:00,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:50:00,153 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 19:50:00,165 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_6.i[1226,1239] [2022-07-19 19:50:00,176 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_6.i[2841,2854] [2022-07-19 19:50:00,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:50:00,186 INFO L208 MainTranslator]: Completed translation [2022-07-19 19:50:00,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00 WrapperNode [2022-07-19 19:50:00,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 19:50:00,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 19:50:00,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 19:50:00,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 19:50:00,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,219 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-19 19:50:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 19:50:00,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 19:50:00,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 19:50:00,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 19:50:00,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 19:50:00,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 19:50:00,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 19:50:00,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 19:50:00,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (1/1) ... [2022-07-19 19:50:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:50:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:00,281 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) [2022-07-19 19:50:00,296 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 [2022-07-19 19:50:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 19:50:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-19 19:50:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-19 19:50:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-19 19:50:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-19 19:50:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 19:50:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 19:50:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 19:50:00,349 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 19:50:00,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 19:50:00,506 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 19:50:00,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 19:50:00,514 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 19:50:00,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:50:00 BoogieIcfgContainer [2022-07-19 19:50:00,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 19:50:00,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 19:50:00,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 19:50:00,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 19:50:00,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 07:49:59" (1/3) ... [2022-07-19 19:50:00,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725d8451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:50:00, skipping insertion in model container [2022-07-19 19:50:00,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:00" (2/3) ... [2022-07-19 19:50:00,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725d8451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:50:00, skipping insertion in model container [2022-07-19 19:50:00,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:50:00" (3/3) ... [2022-07-19 19:50:00,523 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2022-07-19 19:50:00,532 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 19:50:00,533 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 19:50:00,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 19:50:00,566 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@47ca4698, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e52d9bc [2022-07-19 19:50:00,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 19:50:00,569 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) [2022-07-19 19:50:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 19:50:00,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:00,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:00,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-19 19:50:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:00,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689587046] [2022-07-19 19:50:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:00,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689587046] [2022-07-19 19:50:00,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689587046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:50:00,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:50:00,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 19:50:00,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699438835] [2022-07-19 19:50:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:50:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 19:50:00,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 19:50:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 19:50:00,831 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) [2022-07-19 19:50:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:00,895 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-19 19:50:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 19:50:00,898 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 [2022-07-19 19:50:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:00,902 INFO L225 Difference]: With dead ends: 90 [2022-07-19 19:50:00,902 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 19:50:00,905 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 [2022-07-19 19:50:00,912 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 [2022-07-19 19:50:00,914 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] [2022-07-19 19:50:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 19:50:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-19 19:50:00,940 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) [2022-07-19 19:50:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-19 19:50:00,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-19 19:50:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:00,942 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-19 19:50:00,943 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) [2022-07-19 19:50:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-19 19:50:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 19:50:00,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:00,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:00,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 19:50:00,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-19 19:50:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:00,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715158923] [2022-07-19 19:50:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:01,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715158923] [2022-07-19 19:50:01,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715158923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:50:01,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:50:01,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 19:50:01,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614282872] [2022-07-19 19:50:01,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:50:01,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 19:50:01,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 19:50:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 19:50:01,015 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) [2022-07-19 19:50:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:01,085 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-19 19:50:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 19:50:01,085 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 [2022-07-19 19:50:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:01,086 INFO L225 Difference]: With dead ends: 36 [2022-07-19 19:50:01,086 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 19:50:01,088 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 [2022-07-19 19:50:01,089 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 [2022-07-19 19:50:01,090 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] [2022-07-19 19:50:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 19:50:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 19:50:01,096 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) [2022-07-19 19:50:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-19 19:50:01,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-19 19:50:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:01,105 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-19 19:50:01,105 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) [2022-07-19 19:50:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-19 19:50:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 19:50:01,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:01,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:01,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 19:50:01,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-19 19:50:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:01,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552394249] [2022-07-19 19:50:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:01,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:50:01,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248225906] [2022-07-19 19:50:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:01,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:50:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:01,137 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) [2022-07-19 19:50:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 19:50:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 19:50:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:50:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:19,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 19:50:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552394249] [2022-07-19 19:50:29,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 19:50:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248225906] [2022-07-19 19:50:29,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248225906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 19:50:29,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 19:50:29,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-19 19:50:29,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550691325] [2022-07-19 19:50:29,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 19:50:29,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 19:50:29,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 19:50:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=212, Unknown=6, NotChecked=0, Total=272 [2022-07-19 19:50:29,738 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) [2022-07-19 19:50:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:32,225 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-19 19:50:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:50:32,225 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 [2022-07-19 19:50:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:32,226 INFO L225 Difference]: With dead ends: 42 [2022-07-19 19:50:32,226 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 19:50:32,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=74, Invalid=261, Unknown=7, NotChecked=0, Total=342 [2022-07-19 19:50:32,227 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 [2022-07-19 19:50:32,227 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] [2022-07-19 19:50:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 19:50:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-07-19 19:50:32,230 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) [2022-07-19 19:50:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-19 19:50:32,230 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-19 19:50:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:32,231 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-19 19:50:32,231 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) [2022-07-19 19:50:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-19 19:50:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 19:50:32,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:32,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:32,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 19:50:32,451 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 [2022-07-19 19:50:32,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2022-07-19 19:50:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343301094] [2022-07-19 19:50:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:32,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:50:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786658806] [2022-07-19 19:50:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 19:50:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:50:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:32,477 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) [2022-07-19 19:50:32,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 19:50:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 19:50:32,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 19:50:32,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 19:50:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:50:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:58,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 19:52:34,301 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 [2022-07-19 19:52:56,441 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 [2022-07-19 19:53:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-19 19:53:02,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:53:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343301094] [2022-07-19 19:53:02,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 19:53:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786658806] [2022-07-19 19:53:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786658806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 19:53:02,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 19:53:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-19 19:53:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454153557] [2022-07-19 19:53:02,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 19:53:02,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 19:53:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:53:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 19:53:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=184, Unknown=9, NotChecked=58, Total=306 [2022-07-19 19:53:02,981 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) [2022-07-19 19:53:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:53:03,685 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-19 19:53:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:53:03,686 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 [2022-07-19 19:53:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:53:03,687 INFO L225 Difference]: With dead ends: 42 [2022-07-19 19:53:03,687 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 19:53:03,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=55, Invalid=184, Unknown=9, NotChecked=58, Total=306 [2022-07-19 19:53:03,690 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 19:53:03,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 264 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-07-19 19:53:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 19:53:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 19:53:03,701 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) [2022-07-19 19:53:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-19 19:53:03,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-07-19 19:53:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:53:03,703 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-19 19:53:03,703 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) [2022-07-19 19:53:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-19 19:53:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 19:53:03,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:53:03,704 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:53:03,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 19:53:03,919 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 [2022-07-19 19:53:03,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:53:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:53:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1767906835, now seen corresponding path program 3 times [2022-07-19 19:53:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:53:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146766141] [2022-07-19 19:53:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:53:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:53:03,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:53:03,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109057529] [2022-07-19 19:53:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 19:53:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:53:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:53:03,929 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) [2022-07-19 19:53:03,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 19:53:04,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 19:53:04,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 19:53:04,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 19:53:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:53:27,813 WARN L833 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse2) 256))) (let ((.cse0 (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= (mod .cse0 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= .cse0 0) (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse2 .cse1) 256)) (<= .cse2 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse7 (+ (- 256) .cse3))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse4 (mod .cse7 .cse5)) (.cse6 (mod .cse5 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (<= .cse3 127)) (not (= .cse4 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (+ (mod (+ (* 255 .cse5) .cse4) 256) (- 256))) (= (mod .cse6 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= .cse6 0) (not (= .cse5 0)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (= (mod (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse8 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse9 .cse8) 256)) (<= .cse9 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse13 (+ (- 256) .cse10))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse11 (mod .cse13 .cse12))) (and (not (<= .cse10 127)) (not (= .cse11 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (+ (mod (+ (* 255 .cse12) .cse11) 256) (- 256))) (= (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse12 0))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) is different from false [2022-07-19 19:53:41,006 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)