./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_2+newton_2_2.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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_2+newton_2_2.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 edf451b08ccf28b9358a6fa7c10128ea1b9a8f09b01361f9cd588dc4a31f271a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 19:31:40,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 19:31:40,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 19:31:40,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 19:31:40,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 19:31:40,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 19:31:40,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 19:31:40,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 19:31:40,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 19:31:40,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 19:31:40,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 19:31:40,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 19:31:40,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 19:31:40,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 19:31:40,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 19:31:40,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 19:31:40,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 19:31:40,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 19:31:40,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 19:31:40,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 19:31:40,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 19:31:40,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 19:31:40,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 19:31:40,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 19:31:40,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 19:31:40,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 19:31:40,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 19:31:40,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 19:31:40,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 19:31:40,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 19:31:40,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 19:31:40,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 19:31:40,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 19:31:40,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 19:31:40,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 19:31:40,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 19:31:40,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 19:31:40,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 19:31:40,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 19:31:40,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 19:31:40,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 19:31:40,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 19:31:40,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 19:31:40,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 19:31:40,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 19:31:40,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 19:31:40,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 19:31:40,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 19:31:40,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 19:31:40,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 19:31:40,909 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 19:31:40,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 19:31:40,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 19:31:40,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 19:31:40,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 19:31:40,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 19:31:40,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 19:31:40,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 19:31:40,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 19:31:40,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 19:31:40,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 19:31:40,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:31:40,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 19:31:40,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 19:31:40,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 19:31:40,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 19:31:40,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 19:31:40,915 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 19:31:40,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 19:31:40,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 19:31:40,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edf451b08ccf28b9358a6fa7c10128ea1b9a8f09b01361f9cd588dc4a31f271a [2022-02-20 19:31:41,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 19:31:41,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 19:31:41,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 19:31:41,187 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 19:31:41,187 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 19:31:41,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_2+newton_2_2.i [2022-02-20 19:31:41,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b46ba50e6/aed849b33e034aff99c8061faa184599/FLAGcba7e9b93 [2022-02-20 19:31:41,600 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 19:31:41,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_2+newton_2_2.i [2022-02-20 19:31:41,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b46ba50e6/aed849b33e034aff99c8061faa184599/FLAGcba7e9b93 [2022-02-20 19:31:42,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b46ba50e6/aed849b33e034aff99c8061faa184599 [2022-02-20 19:31:42,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 19:31:42,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 19:31:42,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 19:31:42,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 19:31:42,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 19:31:42,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7f8f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42, skipping insertion in model container [2022-02-20 19:31:42,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 19:31:42,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 19:31:42,190 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_2+newton_2_2.i[1226,1239] [2022-02-20 19:31:42,214 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_2+newton_2_2.i[2841,2854] [2022-02-20 19:31:42,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:31:42,223 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 19:31:42,234 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_2+newton_2_2.i[1226,1239] [2022-02-20 19:31:42,244 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_2+newton_2_2.i[2841,2854] [2022-02-20 19:31:42,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:31:42,264 INFO L208 MainTranslator]: Completed translation [2022-02-20 19:31:42,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42 WrapperNode [2022-02-20 19:31:42,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 19:31:42,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 19:31:42,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 19:31:42,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 19:31:42,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,322 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-02-20 19:31:42,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 19:31:42,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 19:31:42,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 19:31:42,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 19:31:42,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 19:31:42,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 19:31:42,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 19:31:42,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 19:31:42,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (1/1) ... [2022-02-20 19:31:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:31:42,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:31:42,396 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) [2022-02-20 19:31:42,409 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 [2022-02-20 19:31:42,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 19:31:42,436 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-02-20 19:31:42,436 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-02-20 19:31:42,436 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 19:31:42,436 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 19:31:42,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 19:31:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 19:31:42,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 19:31:42,495 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 19:31:42,496 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 19:31:42,679 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 19:31:42,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 19:31:42,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 19:31:42,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:31:42 BoogieIcfgContainer [2022-02-20 19:31:42,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 19:31:42,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 19:31:42,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 19:31:42,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 19:31:42,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 07:31:42" (1/3) ... [2022-02-20 19:31:42,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48352378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:31:42, skipping insertion in model container [2022-02-20 19:31:42,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:31:42" (2/3) ... [2022-02-20 19:31:42,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48352378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:31:42, skipping insertion in model container [2022-02-20 19:31:42,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:31:42" (3/3) ... [2022-02-20 19:31:42,694 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_2.i [2022-02-20 19:31:42,698 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 19:31:42,701 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 19:31:42,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 19:31:42,787 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 19:31:42,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 19:31:42,807 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) [2022-02-20 19:31:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:31:42,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:31:42,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:31:42,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:31:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:31:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-02-20 19:31:42,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:31:42,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746724152] [2022-02-20 19:31:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:31:42,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:31:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:31:43,090 INFO L290 TraceCheckUtils]: 0: Hoare triple {40#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {40#true} is VALID [2022-02-20 19:31:43,091 INFO L290 TraceCheckUtils]: 1: Hoare triple {40#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet13#1, main_#t~ret14#1, main_#t~ret15#1;assume -2147483648 <= main_#t~nondet13#1 && main_#t~nondet13#1 <= 2147483647; {40#true} is VALID [2022-02-20 19:31:43,092 INFO L290 TraceCheckUtils]: 2: Hoare triple {40#true} assume 0 != main_#t~nondet13#1;havoc main_#t~nondet13#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~nondet5#1, main1_#t~nondet6#1, main1_#t~ret7#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;assume -128 <= main1_#t~nondet5#1 && main1_#t~nondet5#1 <= 127;main1_~x~0#1 := main1_#t~nondet5#1;havoc main1_#t~nondet5#1;assume -128 <= main1_#t~nondet6#1 && main1_#t~nondet6#1 <= 127;main1_~y~0#1 := main1_#t~nondet6#1;havoc main1_#t~nondet6#1;havoc main1_~g~0#1;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1, gcd_test_~t~0#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1;havoc gcd_test_~t~0#1; {42#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:31:43,096 INFO L290 TraceCheckUtils]: 3: Hoare triple {42#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} assume gcd_test_~a#1 < 0;gcd_test_~a#1 := (if -gcd_test_~a#1 % 256 <= 127 then -gcd_test_~a#1 % 256 else -gcd_test_~a#1 % 256 - 256); {42#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:31:43,097 INFO L290 TraceCheckUtils]: 4: Hoare triple {42#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} assume gcd_test_~b#1 < 0;gcd_test_~b#1 := (if -gcd_test_~b#1 % 256 <= 127 then -gcd_test_~b#1 % 256 else -gcd_test_~b#1 % 256 - 256); {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} is VALID [2022-02-20 19:31:43,098 INFO L290 TraceCheckUtils]: 5: Hoare triple {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} assume !(0 != gcd_test_~b#1); {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} is VALID [2022-02-20 19:31:43,098 INFO L290 TraceCheckUtils]: 6: Hoare triple {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} gcd_test_#res#1 := gcd_test_~a#1; {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} is VALID [2022-02-20 19:31:43,099 INFO L290 TraceCheckUtils]: 7: Hoare triple {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} main1_#t~ret7#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -128 <= main1_#t~ret7#1 && main1_#t~ret7#1 <= 127;main1_~g~0#1 := main1_#t~ret7#1;havoc main1_#t~ret7#1; {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} is VALID [2022-02-20 19:31:43,102 INFO L290 TraceCheckUtils]: 8: Hoare triple {43#(<= (+ |ULTIMATE.start_main1_~y~0#1| 1) 0)} assume main1_~y~0#1 > 0;assume { :begin_inline___VERIFIER_assert } true;__VERIFIER_assert_#in~cond#1 := (if main1_~y~0#1 >= main1_~g~0#1 then 1 else 0);havoc __VERIFIER_assert_~cond#1;__VERIFIER_assert_~cond#1 := __VERIFIER_assert_#in~cond#1; {41#false} is VALID [2022-02-20 19:31:43,102 INFO L290 TraceCheckUtils]: 9: Hoare triple {41#false} assume 0 == __VERIFIER_assert_~cond#1; {41#false} is VALID [2022-02-20 19:31:43,102 INFO L290 TraceCheckUtils]: 10: Hoare triple {41#false} assume !false; {41#false} is VALID [2022-02-20 19:31:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:31:43,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:31:43,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746724152] [2022-02-20 19:31:43,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746724152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:31:43,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:31:43,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-20 19:31:43,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386119283] [2022-02-20 19:31:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:31:43,111 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 [2022-02-20 19:31:43,113 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:31:43,116 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 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) [2022-02-20 19:31:43,134 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:43,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-20 19:31:43,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:31:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-20 19:31:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-20 19:31:43,165 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) [2022-02-20 19:31:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,385 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-02-20 19:31:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-20 19:31:43,386 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 [2022-02-20 19:31:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:31:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-02-20 19:31:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2022-02-20 19:31:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-02-20 19:31:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2022-02-20 19:31:43,402 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 111 transitions. [2022-02-20 19:31:43,499 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 111 edges. 111 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:43,524 INFO L225 Difference]: With dead ends: 90 [2022-02-20 19:31:43,524 INFO L226 Difference]: Without dead ends: 36 [2022-02-20 19:31:43,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-20 19:31:43,529 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:31:43,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:31:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-20 19:31:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-02-20 19:31:43,556 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:31:43,557 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second 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) [2022-02-20 19:31:43,558 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second 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) [2022-02-20 19:31:43,559 INFO L87 Difference]: Start difference. First operand 36 states. Second 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) [2022-02-20 19:31:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,568 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-02-20 19:31:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-20 19:31:43,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:43,568 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:43,569 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 36 states. [2022-02-20 19:31:43,570 INFO L87 Difference]: Start difference. First 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) Second operand 36 states. [2022-02-20 19:31:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,577 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-02-20 19:31:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-20 19:31:43,579 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:43,579 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:43,580 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:31:43,580 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:31:43,581 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) [2022-02-20 19:31:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-02-20 19:31:43,585 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-02-20 19:31:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:31:43,586 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-02-20 19:31:43,587 INFO L471 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) [2022-02-20 19:31:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-02-20 19:31:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:31:43,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:31:43,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:31:43,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 19:31:43,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:31:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:31:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-02-20 19:31:43,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:31:43,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523062098] [2022-02-20 19:31:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:31:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:31:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:31:43,679 INFO L290 TraceCheckUtils]: 0: Hoare triple {271#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {271#true} is VALID [2022-02-20 19:31:43,679 INFO L290 TraceCheckUtils]: 1: Hoare triple {271#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet13#1, main_#t~ret14#1, main_#t~ret15#1;assume -2147483648 <= main_#t~nondet13#1 && main_#t~nondet13#1 <= 2147483647; {271#true} is VALID [2022-02-20 19:31:43,680 INFO L290 TraceCheckUtils]: 2: Hoare triple {271#true} assume 0 != main_#t~nondet13#1;havoc main_#t~nondet13#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~nondet5#1, main1_#t~nondet6#1, main1_#t~ret7#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;assume -128 <= main1_#t~nondet5#1 && main1_#t~nondet5#1 <= 127;main1_~x~0#1 := main1_#t~nondet5#1;havoc main1_#t~nondet5#1;assume -128 <= main1_#t~nondet6#1 && main1_#t~nondet6#1 <= 127;main1_~y~0#1 := main1_#t~nondet6#1;havoc main1_#t~nondet6#1;havoc main1_~g~0#1;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1, gcd_test_~t~0#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1;havoc gcd_test_~t~0#1; {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:31:43,681 INFO L290 TraceCheckUtils]: 3: Hoare triple {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} assume gcd_test_~a#1 < 0;gcd_test_~a#1 := (if -gcd_test_~a#1 % 256 <= 127 then -gcd_test_~a#1 % 256 else -gcd_test_~a#1 % 256 - 256); {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:31:43,681 INFO L290 TraceCheckUtils]: 4: Hoare triple {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} assume !(gcd_test_~b#1 < 0); {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:31:43,682 INFO L290 TraceCheckUtils]: 5: Hoare triple {273#(<= |ULTIMATE.start_main1_~y~0#1| |ULTIMATE.start_gcd_test_~b#1|)} assume !(0 != gcd_test_~b#1); {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} is VALID [2022-02-20 19:31:43,682 INFO L290 TraceCheckUtils]: 6: Hoare triple {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} gcd_test_#res#1 := gcd_test_~a#1; {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} is VALID [2022-02-20 19:31:43,683 INFO L290 TraceCheckUtils]: 7: Hoare triple {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} main1_#t~ret7#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -128 <= main1_#t~ret7#1 && main1_#t~ret7#1 <= 127;main1_~g~0#1 := main1_#t~ret7#1;havoc main1_#t~ret7#1; {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} is VALID [2022-02-20 19:31:43,683 INFO L290 TraceCheckUtils]: 8: Hoare triple {274#(<= |ULTIMATE.start_main1_~y~0#1| 0)} assume main1_~y~0#1 > 0;assume { :begin_inline___VERIFIER_assert } true;__VERIFIER_assert_#in~cond#1 := (if main1_~y~0#1 >= main1_~g~0#1 then 1 else 0);havoc __VERIFIER_assert_~cond#1;__VERIFIER_assert_~cond#1 := __VERIFIER_assert_#in~cond#1; {272#false} is VALID [2022-02-20 19:31:43,683 INFO L290 TraceCheckUtils]: 9: Hoare triple {272#false} assume 0 == __VERIFIER_assert_~cond#1; {272#false} is VALID [2022-02-20 19:31:43,684 INFO L290 TraceCheckUtils]: 10: Hoare triple {272#false} assume !false; {272#false} is VALID [2022-02-20 19:31:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:31:43,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:31:43,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523062098] [2022-02-20 19:31:43,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523062098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:31:43,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:31:43,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-20 19:31:43,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779751717] [2022-02-20 19:31:43,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:31:43,687 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 [2022-02-20 19:31:43,687 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:31:43,687 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 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) [2022-02-20 19:31:43,702 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:43,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-20 19:31:43,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:31:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-20 19:31:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-20 19:31:43,703 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. 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) [2022-02-20 19:31:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,788 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-02-20 19:31:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-20 19:31:43,788 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 [2022-02-20 19:31:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:31:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-02-20 19:31:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2022-02-20 19:31:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-02-20 19:31:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2022-02-20 19:31:43,792 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 39 transitions. [2022-02-20 19:31:43,822 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 39 edges. 39 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:43,823 INFO L225 Difference]: With dead ends: 36 [2022-02-20 19:31:43,824 INFO L226 Difference]: Without dead ends: 30 [2022-02-20 19:31:43,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-20 19:31:43,825 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:31:43,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:31:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-20 19:31:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-20 19:31:43,830 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:31:43,830 INFO L82 GeneralOperation]: Start isEquivalent. First operand 30 states. Second 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) [2022-02-20 19:31:43,830 INFO L74 IsIncluded]: Start isIncluded. First operand 30 states. Second 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) [2022-02-20 19:31:43,831 INFO L87 Difference]: Start difference. First operand 30 states. Second 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) [2022-02-20 19:31:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,833 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-02-20 19:31:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-20 19:31:43,834 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:43,834 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:43,834 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 30 states. [2022-02-20 19:31:43,834 INFO L87 Difference]: Start difference. First 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) Second operand 30 states. [2022-02-20 19:31:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:43,836 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-02-20 19:31:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-20 19:31:43,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:43,837 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:43,837 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:31:43,838 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:31:43,838 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) [2022-02-20 19:31:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-20 19:31:43,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-02-20 19:31:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:31:43,840 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-20 19:31:43,840 INFO L471 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) [2022-02-20 19:31:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-20 19:31:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-20 19:31:43,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:31:43,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:31:43,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-20 19:31:43,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:31:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:31:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-02-20 19:31:43,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:31:43,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441506706] [2022-02-20 19:31:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:31:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:31:43,860 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:31:43,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881815917] [2022-02-20 19:31:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:31:43,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:31:43,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:31:43,863 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) [2022-02-20 19:31:43,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-20 19:31:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:31:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-20 19:31:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:31:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:31:44,131 INFO L290 TraceCheckUtils]: 0: Hoare triple {420#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {420#true} is VALID [2022-02-20 19:31:44,132 INFO L290 TraceCheckUtils]: 1: Hoare triple {420#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet13#1, main_#t~ret14#1, main_#t~ret15#1;assume -2147483648 <= main_#t~nondet13#1 && main_#t~nondet13#1 <= 2147483647; {420#true} is VALID [2022-02-20 19:31:44,133 INFO L290 TraceCheckUtils]: 2: Hoare triple {420#true} assume 0 != main_#t~nondet13#1;havoc main_#t~nondet13#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~nondet5#1, main1_#t~nondet6#1, main1_#t~ret7#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;assume -128 <= main1_#t~nondet5#1 && main1_#t~nondet5#1 <= 127;main1_~x~0#1 := main1_#t~nondet5#1;havoc main1_#t~nondet5#1;assume -128 <= main1_#t~nondet6#1 && main1_#t~nondet6#1 <= 127;main1_~y~0#1 := main1_#t~nondet6#1;havoc main1_#t~nondet6#1;havoc main1_~g~0#1;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1, gcd_test_~t~0#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1;havoc gcd_test_~t~0#1; {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,133 INFO L290 TraceCheckUtils]: 3: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume gcd_test_~a#1 < 0;gcd_test_~a#1 := (if -gcd_test_~a#1 % 256 <= 127 then -gcd_test_~a#1 % 256 else -gcd_test_~a#1 % 256 - 256); {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,134 INFO L290 TraceCheckUtils]: 4: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume !(gcd_test_~b#1 < 0); {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,135 INFO L290 TraceCheckUtils]: 5: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume !!(0 != gcd_test_~b#1);gcd_test_~t~0#1 := gcd_test_~b#1;gcd_test_~b#1 := (if (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 <= 127 then (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 else (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 - 256);gcd_test_~a#1 := gcd_test_~t~0#1; {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,135 INFO L290 TraceCheckUtils]: 6: Hoare triple {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} assume !(0 != gcd_test_~b#1); {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,136 INFO L290 TraceCheckUtils]: 7: Hoare triple {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} gcd_test_#res#1 := gcd_test_~a#1; {448#(<= |ULTIMATE.start_gcd_test_#res#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,136 INFO L290 TraceCheckUtils]: 8: Hoare triple {448#(<= |ULTIMATE.start_gcd_test_#res#1| |ULTIMATE.start_main1_~y~0#1|)} main1_#t~ret7#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -128 <= main1_#t~ret7#1 && main1_#t~ret7#1 <= 127;main1_~g~0#1 := main1_#t~ret7#1;havoc main1_#t~ret7#1; {452#(<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,137 INFO L290 TraceCheckUtils]: 9: Hoare triple {452#(<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)} assume main1_~y~0#1 > 0;assume { :begin_inline___VERIFIER_assert } true;__VERIFIER_assert_#in~cond#1 := (if main1_~y~0#1 >= main1_~g~0#1 then 1 else 0);havoc __VERIFIER_assert_~cond#1;__VERIFIER_assert_~cond#1 := __VERIFIER_assert_#in~cond#1; {456#(<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|)} is VALID [2022-02-20 19:31:44,138 INFO L290 TraceCheckUtils]: 10: Hoare triple {456#(<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|)} assume 0 == __VERIFIER_assert_~cond#1; {421#false} is VALID [2022-02-20 19:31:44,138 INFO L290 TraceCheckUtils]: 11: Hoare triple {421#false} assume !false; {421#false} is VALID [2022-02-20 19:31:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:31:44,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:31:44,308 INFO L290 TraceCheckUtils]: 11: Hoare triple {421#false} assume !false; {421#false} is VALID [2022-02-20 19:31:44,309 INFO L290 TraceCheckUtils]: 10: Hoare triple {456#(<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|)} assume 0 == __VERIFIER_assert_~cond#1; {421#false} is VALID [2022-02-20 19:31:44,310 INFO L290 TraceCheckUtils]: 9: Hoare triple {452#(<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)} assume main1_~y~0#1 > 0;assume { :begin_inline___VERIFIER_assert } true;__VERIFIER_assert_#in~cond#1 := (if main1_~y~0#1 >= main1_~g~0#1 then 1 else 0);havoc __VERIFIER_assert_~cond#1;__VERIFIER_assert_~cond#1 := __VERIFIER_assert_#in~cond#1; {456#(<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|)} is VALID [2022-02-20 19:31:44,310 INFO L290 TraceCheckUtils]: 8: Hoare triple {448#(<= |ULTIMATE.start_gcd_test_#res#1| |ULTIMATE.start_main1_~y~0#1|)} main1_#t~ret7#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -128 <= main1_#t~ret7#1 && main1_#t~ret7#1 <= 127;main1_~g~0#1 := main1_#t~ret7#1;havoc main1_#t~ret7#1; {452#(<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,311 INFO L290 TraceCheckUtils]: 7: Hoare triple {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} gcd_test_#res#1 := gcd_test_~a#1; {448#(<= |ULTIMATE.start_gcd_test_#res#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,311 INFO L290 TraceCheckUtils]: 6: Hoare triple {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} assume !(0 != gcd_test_~b#1); {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,312 INFO L290 TraceCheckUtils]: 5: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume !!(0 != gcd_test_~b#1);gcd_test_~t~0#1 := gcd_test_~b#1;gcd_test_~b#1 := (if (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 <= 127 then (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 else (if gcd_test_~a#1 < 0 && 0 != gcd_test_~a#1 % gcd_test_~b#1 then (if gcd_test_~b#1 < 0 then gcd_test_~a#1 % gcd_test_~b#1 + gcd_test_~b#1 else gcd_test_~a#1 % gcd_test_~b#1 - gcd_test_~b#1) else gcd_test_~a#1 % gcd_test_~b#1) % 256 - 256);gcd_test_~a#1 := gcd_test_~t~0#1; {441#(<= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,313 INFO L290 TraceCheckUtils]: 4: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume !(gcd_test_~b#1 < 0); {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,313 INFO L290 TraceCheckUtils]: 3: Hoare triple {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} assume gcd_test_~a#1 < 0;gcd_test_~a#1 := (if -gcd_test_~a#1 % 256 <= 127 then -gcd_test_~a#1 % 256 else -gcd_test_~a#1 % 256 - 256); {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,314 INFO L290 TraceCheckUtils]: 2: Hoare triple {420#true} assume 0 != main_#t~nondet13#1;havoc main_#t~nondet13#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~nondet5#1, main1_#t~nondet6#1, main1_#t~ret7#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;assume -128 <= main1_#t~nondet5#1 && main1_#t~nondet5#1 <= 127;main1_~x~0#1 := main1_#t~nondet5#1;havoc main1_#t~nondet5#1;assume -128 <= main1_#t~nondet6#1 && main1_#t~nondet6#1 <= 127;main1_~y~0#1 := main1_#t~nondet6#1;havoc main1_#t~nondet6#1;havoc main1_~g~0#1;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1, gcd_test_~t~0#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1;havoc gcd_test_~t~0#1; {431#(<= |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main1_~y~0#1|)} is VALID [2022-02-20 19:31:44,314 INFO L290 TraceCheckUtils]: 1: Hoare triple {420#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet13#1, main_#t~ret14#1, main_#t~ret15#1;assume -2147483648 <= main_#t~nondet13#1 && main_#t~nondet13#1 <= 2147483647; {420#true} is VALID [2022-02-20 19:31:44,314 INFO L290 TraceCheckUtils]: 0: Hoare triple {420#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {420#true} is VALID [2022-02-20 19:31:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:31:44,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:31:44,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441506706] [2022-02-20 19:31:44,315 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:31:44,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881815917] [2022-02-20 19:31:44,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881815917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:31:44,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:31:44,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-02-20 19:31:44,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933818233] [2022-02-20 19:31:44,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:31:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-20 19:31:44,317 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:31:44,318 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:31:44,328 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:44,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-20 19:31:44,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:31:44,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-20 19:31:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-20 19:31:44,329 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:31:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:44,525 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-02-20 19:31:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-20 19:31:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-20 19:31:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:31:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:31:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2022-02-20 19:31:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:31:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2022-02-20 19:31:44,534 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 40 transitions. [2022-02-20 19:31:44,578 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:31:44,580 INFO L225 Difference]: With dead ends: 37 [2022-02-20 19:31:44,580 INFO L226 Difference]: Without dead ends: 31 [2022-02-20 19:31:44,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-20 19:31:44,582 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:31:44,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:31:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-20 19:31:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-20 19:31:44,585 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:31:44,586 INFO L82 GeneralOperation]: Start isEquivalent. First operand 31 states. Second 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) [2022-02-20 19:31:44,586 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second 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) [2022-02-20 19:31:44,586 INFO L87 Difference]: Start difference. First operand 31 states. Second 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) [2022-02-20 19:31:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:44,588 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-02-20 19:31:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-20 19:31:44,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:44,589 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:44,589 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 31 states. [2022-02-20 19:31:44,590 INFO L87 Difference]: Start difference. First 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) Second operand 31 states. [2022-02-20 19:31:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:31:44,592 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-02-20 19:31:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-20 19:31:44,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:31:44,592 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:31:44,593 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:31:44,593 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:31:44,593 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) [2022-02-20 19:31:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-20 19:31:44,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-02-20 19:31:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:31:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-20 19:31:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:31:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-20 19:31:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-20 19:31:44,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:31:44,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:31:44,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-20 19:31:44,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:31:44,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:31:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:31:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-02-20 19:31:44,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:31:44,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773206618] [2022-02-20 19:31:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:31:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:31:44,848 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:31:44,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183423691] [2022-02-20 19:31:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-20 19:31:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:31:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:31:44,856 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) [2022-02-20 19:31:44,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-20 19:31:44,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-20 19:31:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-20 19:31:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-20 19:31:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:31:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates...