./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 35987657 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-?-3598765 [2022-07-21 07:25:03,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:25:03,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:25:04,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:25:04,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:25:04,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:25:04,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:25:04,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:25:04,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:25:04,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:25:04,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:25:04,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:25:04,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:25:04,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:25:04,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:25:04,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:25:04,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:25:04,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:25:04,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:25:04,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:25:04,070 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:25:04,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:25:04,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:25:04,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:25:04,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:25:04,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:25:04,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:25:04,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:25:04,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:25:04,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:25:04,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:25:04,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:25:04,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:25:04,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:25:04,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:25:04,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:25:04,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:25:04,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:25:04,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:25:04,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:25:04,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:25:04,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:25:04,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:25:04,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:25:04,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:25:04,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:25:04,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:25:04,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:25:04,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:25:04,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:25:04,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:25:04,134 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:25:04,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:25:04,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:25:04,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:25:04,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:25:04,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:25:04,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:25:04,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:25:04,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:25:04,136 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:25:04,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:25:04,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:25:04,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:25:04,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:25:04,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:25:04,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:25:04,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:25:04,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:25:04,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:25:04,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:25:04,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:25:04,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:25:04,139 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:25:04,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:25:04,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:25:04,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2022-07-21 07:25:04,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:25:04,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:25:04,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:25:04,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:25:04,451 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:25:04,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-07-21 07:25:04,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42361717c/1ed87403ab2a4f51954630dddd021780/FLAGeddeea1ee [2022-07-21 07:25:04,955 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:25:04,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-07-21 07:25:04,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42361717c/1ed87403ab2a4f51954630dddd021780/FLAGeddeea1ee [2022-07-21 07:25:04,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42361717c/1ed87403ab2a4f51954630dddd021780 [2022-07-21 07:25:04,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:25:04,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:25:04,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:25:04,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:25:04,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:25:05,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:25:04" (1/1) ... [2022-07-21 07:25:05,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@235938ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05, skipping insertion in model container [2022-07-21 07:25:05,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:25:04" (1/1) ... [2022-07-21 07:25:05,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:25:05,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:25:05,179 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] [2022-07-21 07:25:05,229 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] [2022-07-21 07:25:05,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:25:05,237 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:25:05,266 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] [2022-07-21 07:25:05,285 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] [2022-07-21 07:25:05,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:25:05,300 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:25:05,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05 WrapperNode [2022-07-21 07:25:05,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:25:05,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:25:05,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:25:05,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:25:05,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,350 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-21 07:25:05,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:25:05,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:25:05,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:25:05,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:25:05,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:25:05,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:25:05,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:25:05,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:25:05,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (1/1) ... [2022-07-21 07:25:05,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:25:05,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:25:05,429 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) [2022-07-21 07:25:05,451 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 [2022-07-21 07:25:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:25:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-21 07:25:05,472 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-21 07:25:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-21 07:25:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-21 07:25:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:25:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:25:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:25:05,526 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:25:05,528 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:25:05,792 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:25:05,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:25:05,797 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:25:05,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:25:05 BoogieIcfgContainer [2022-07-21 07:25:05,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:25:05,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:25:05,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:25:05,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:25:05,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:25:04" (1/3) ... [2022-07-21 07:25:05,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa8dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:25:05, skipping insertion in model container [2022-07-21 07:25:05,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:25:05" (2/3) ... [2022-07-21 07:25:05,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa8dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:25:05, skipping insertion in model container [2022-07-21 07:25:05,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:25:05" (3/3) ... [2022-07-21 07:25:05,810 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2022-07-21 07:25:05,823 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:25:05,824 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:25:05,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:25:05,894 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@48b5cd15, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79a56879 [2022-07-21 07:25:05,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:25:05,900 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) [2022-07-21 07:25:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:25:05,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:25:05,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:25:05,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:25:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:25:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-21 07:25:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:25:05,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306240399] [2022-07-21 07:25:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:25:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:25:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:25:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:25:06,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:25:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306240399] [2022-07-21 07:25:06,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306240399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:25:06,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:25:06,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 07:25:06,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207529340] [2022-07-21 07:25:06,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:25:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 07:25:06,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:25:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 07:25:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 07:25:06,195 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) [2022-07-21 07:25:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:25:06,261 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-21 07:25:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 07:25:06,263 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 [2022-07-21 07:25:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:25:06,269 INFO L225 Difference]: With dead ends: 90 [2022-07-21 07:25:06,269 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 07:25:06,272 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 [2022-07-21 07:25:06,277 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 [2022-07-21 07:25:06,278 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] [2022-07-21 07:25:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 07:25:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-21 07:25:06,311 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) [2022-07-21 07:25:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-21 07:25:06,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-21 07:25:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:25:06,316 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-21 07:25:06,317 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) [2022-07-21 07:25:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-21 07:25:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:25:06,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:25:06,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:25:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:25:06,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:25:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:25:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-21 07:25:06,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:25:06,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450274854] [2022-07-21 07:25:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:25:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:25:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:25:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:25:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:25:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450274854] [2022-07-21 07:25:06,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450274854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:25:06,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:25:06,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:25:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864296628] [2022-07-21 07:25:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:25:06,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:25:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:25:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:25:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:25:06,399 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) [2022-07-21 07:25:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:25:06,487 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-21 07:25:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:25:06,487 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 [2022-07-21 07:25:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:25:06,488 INFO L225 Difference]: With dead ends: 36 [2022-07-21 07:25:06,488 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 07:25:06,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:25:06,490 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 [2022-07-21 07:25:06,490 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] [2022-07-21 07:25:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 07:25:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 07:25:06,495 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) [2022-07-21 07:25:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-21 07:25:06,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-21 07:25:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:25:06,496 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-21 07:25:06,497 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) [2022-07-21 07:25:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-21 07:25:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 07:25:06,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:25:06,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:25:06,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:25:06,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:25:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:25:06,499 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-21 07:25:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:25:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320023410] [2022-07-21 07:25:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:25:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:25:06,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:25:06,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914927581] [2022-07-21 07:25:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:25:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:25:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:25:06,515 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) [2022-07-21 07:25:06,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:25:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:25:06,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 07:25:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:25:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:25:25,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:25:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:25:29,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:25:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320023410] [2022-07-21 07:25:29,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:25:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914927581] [2022-07-21 07:25:29,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914927581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:25:29,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:25:29,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-21 07:25:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334652528] [2022-07-21 07:25:29,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:25:29,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 07:25:29,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:25:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 07:25:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=213, Unknown=5, NotChecked=0, Total=272 [2022-07-21 07:25:29,798 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) [2022-07-21 07:25:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:25:32,577 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-21 07:25:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 07:25:32,577 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 [2022-07-21 07:25:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:25:32,578 INFO L225 Difference]: With dead ends: 42 [2022-07-21 07:25:32,578 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 07:25:32,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=74, Invalid=262, Unknown=6, NotChecked=0, Total=342 [2022-07-21 07:25:32,580 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 [2022-07-21 07:25:32,580 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] [2022-07-21 07:25:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 07:25:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-07-21 07:25:32,584 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) [2022-07-21 07:25:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-21 07:25:32,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-21 07:25:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:25:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-21 07:25:32,585 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) [2022-07-21 07:25:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-21 07:25:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 07:25:32,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:25:32,587 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:25:32,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 07:25:32,800 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 [2022-07-21 07:25:32,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:25:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:25:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2022-07-21 07:25:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:25:32,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311357772] [2022-07-21 07:25:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:25:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:25:32,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:25:32,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122118862] [2022-07-21 07:25:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 07:25:32,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:25:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:25:32,819 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) [2022-07-21 07:25:32,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:25:32,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 07:25:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:25:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 07:25:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:25:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:25:52,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:27:16,620 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 [2022-07-21 07:27:54,838 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 [2022-07-21 07:27:56,848 WARN L855 $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 true [2022-07-21 07:28:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 07:28:04,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:28:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311357772] [2022-07-21 07:28:04,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:28:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122118862] [2022-07-21 07:28:04,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122118862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:28:04,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:28:04,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-21 07:28:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108996786] [2022-07-21 07:28:04,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:28:04,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 07:28:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:28:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 07:28:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=186, Unknown=7, NotChecked=58, Total=306 [2022-07-21 07:28:04,455 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) [2022-07-21 07:28:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:28:05,367 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-21 07:28:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 07:28:05,368 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 [2022-07-21 07:28:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:28:05,369 INFO L225 Difference]: With dead ends: 42 [2022-07-21 07:28:05,369 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 07:28:05,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=55, Invalid=186, Unknown=7, NotChecked=58, Total=306 [2022-07-21 07:28:05,370 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 07:28:05,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-07-21 07:28:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 07:28:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-21 07:28:05,374 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) [2022-07-21 07:28:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-21 07:28:05,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-07-21 07:28:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:28:05,375 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-21 07:28:05,375 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) [2022-07-21 07:28:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-21 07:28:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 07:28:05,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:28:05,376 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:28:05,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 07:28:05,576 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 [2022-07-21 07:28:05,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:28:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:28:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1767906835, now seen corresponding path program 3 times [2022-07-21 07:28:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:28:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638368356] [2022-07-21 07:28:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:28:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:28:05,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:28:05,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684015579] [2022-07-21 07:28:05,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 07:28:05,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:28:05,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:28:05,593 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) [2022-07-21 07:28:05,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 07:28:05,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 07:28:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:28:05,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 07:28:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:28:31,681 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