./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_1+newton_2_8.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 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:45:44,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:45:44,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:45:44,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:45:44,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:45:44,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:45:44,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:45:44,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:45:44,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:45:44,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:45:44,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:45:44,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:45:44,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:45:44,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:45:44,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:45:44,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:45:44,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:45:44,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:45:44,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:45:44,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:45:44,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:45:44,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:45:44,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:45:44,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:45:44,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:45:44,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:45:44,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:45:44,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:45:44,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:45:44,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:45:44,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:45:44,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:45:44,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:45:44,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:45:44,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:45:44,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:45:44,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:45:44,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:45:44,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:45:44,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:45:44,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:45:44,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:45:44,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:45:44,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:45:44,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:45:44,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:45:44,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:45:44,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:45:44,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:45:44,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:45:44,148 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:45:44,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:45:44,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:45:44,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:45:44,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:45:44,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:45:44,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:45:44,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:45:44,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:45:44,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:45:44,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:45:44,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:45:44,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:45:44,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:45:44,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:45:44,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:45:44,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24df3a04bdb7e751c4f0d163e80822f74241222ac6f56a91a0bf72df65694e1b [2021-12-22 12:45:44,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:45:44,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:45:44,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:45:44,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:45:44,364 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:45:44,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2021-12-22 12:45:44,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a25e96fab/fc21d69b4aad421097cd50e1d3189e73/FLAG8b39b162c [2021-12-22 12:45:44,762 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:45:44,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_1+newton_2_8.i [2021-12-22 12:45:44,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a25e96fab/fc21d69b4aad421097cd50e1d3189e73/FLAG8b39b162c [2021-12-22 12:45:45,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a25e96fab/fc21d69b4aad421097cd50e1d3189e73 [2021-12-22 12:45:45,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:45:45,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:45:45,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:45:45,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:45:45,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:45:45,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aba4d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45, skipping insertion in model container [2021-12-22 12:45:45,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:45:45,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:45:45,353 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_1+newton_2_8.i[1226,1239] [2021-12-22 12:45:45,372 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_1+newton_2_8.i[2807,2820] [2021-12-22 12:45:45,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:45:45,380 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:45:45,390 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_1+newton_2_8.i[1226,1239] [2021-12-22 12:45:45,398 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_1+newton_2_8.i[2807,2820] [2021-12-22 12:45:45,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:45:45,410 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:45:45,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45 WrapperNode [2021-12-22 12:45:45,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:45:45,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:45:45,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:45:45,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:45:45,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,442 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-22 12:45:45,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:45:45,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:45:45,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:45:45,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:45:45,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:45:45,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:45:45,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:45:45,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:45:45,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (1/1) ... [2021-12-22 12:45:45,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:45:45,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:45:45,511 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) [2021-12-22 12:45:45,536 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 [2021-12-22 12:45:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:45:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-22 12:45:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-22 12:45:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-22 12:45:45,552 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-22 12:45:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:45:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:45:45,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:45:45,617 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:45:45,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:45:45,773 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:45:45,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:45:45,779 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 12:45:45,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:45:45 BoogieIcfgContainer [2021-12-22 12:45:45,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:45:45,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:45:45,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:45:45,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:45:45,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:45:45" (1/3) ... [2021-12-22 12:45:45,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248ca5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:45:45, skipping insertion in model container [2021-12-22 12:45:45,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:45:45" (2/3) ... [2021-12-22 12:45:45,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248ca5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:45:45, skipping insertion in model container [2021-12-22 12:45:45,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:45:45" (3/3) ... [2021-12-22 12:45:45,787 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_8.i [2021-12-22 12:45:45,792 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:45:45,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:45:45,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:45:45,836 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 [2021-12-22 12:45:45,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:45:45,864 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) [2021-12-22 12:45:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 12:45:45,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:45:45,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:45:45,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:45:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:45:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-12-22 12:45:45,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:45:45,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411496926] [2021-12-22 12:45:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:45,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:45:45,961 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 12:45:45,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112012124] [2021-12-22 12:45:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:45,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:45:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:45:45,965 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) [2021-12-22 12:45:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:45:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:45:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 12:45:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:45:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:45:46,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:45:46,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:45:46,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411496926] [2021-12-22 12:45:46,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 12:45:46,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112012124] [2021-12-22 12:45:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112012124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:45:46,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:45:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:45:46,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330239809] [2021-12-22 12:45:46,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:45:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 12:45:46,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:45:46,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 12:45:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:45:46,178 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 12:45:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:45:46,202 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-12-22 12:45:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 12:45:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-12-22 12:45:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:45:46,211 INFO L225 Difference]: With dead ends: 66 [2021-12-22 12:45:46,211 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 12:45:46,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:45:46,218 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:45:46,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:45:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 12:45:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 12:45:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 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) [2021-12-22 12:45:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-22 12:45:46,260 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-12-22 12:45:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:45:46,261 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-22 12:45:46,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 12:45:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-22 12:45:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 12:45:46,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:45:46,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:45:46,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 12:45:46,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 12:45:46,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:45:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:45:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-12-22 12:45:46,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:45:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81930131] [2021-12-22 12:45:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:46,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:45:46,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 12:45:46,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046696473] [2021-12-22 12:45:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:46,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:45:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:45:46,496 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) [2021-12-22 12:45:46,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:45:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:45:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 12:45:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:45:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:45:46,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:45:46,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:45:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81930131] [2021-12-22 12:45:46,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 12:45:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046696473] [2021-12-22 12:45:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046696473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:45:46,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:45:46,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:45:46,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592347906] [2021-12-22 12:45:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:45:46,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:45:46,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:45:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:45:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:45:46,637 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-22 12:45:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:45:46,658 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-22 12:45:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:45:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-12-22 12:45:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:45:46,659 INFO L225 Difference]: With dead ends: 36 [2021-12-22 12:45:46,660 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 12:45:46,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:45:46,663 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:45:46,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:45:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 12:45:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 12:45:46,674 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) [2021-12-22 12:45:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-22 12:45:46,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-22 12:45:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:45:46,676 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-22 12:45:46,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-22 12:45:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-22 12:45:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 12:45:46,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:45:46,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:45:46,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:45:46,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-22 12:45:46,884 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:45:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:45:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-12-22 12:45:46,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:45:46,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372111641] [2021-12-22 12:45:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:46,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:45:46,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 12:45:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008670269] [2021-12-22 12:45:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:46,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:45:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:45:46,903 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) [2021-12-22 12:45:46,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:45:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:45:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 12:45:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:45:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:45:47,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:45:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:45:47,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:45:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372111641] [2021-12-22 12:45:47,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 12:45:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008670269] [2021-12-22 12:45:47,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008670269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:45:47,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 12:45:47,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-22 12:45:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972493912] [2021-12-22 12:45:47,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 12:45:47,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:45:47,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:45:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:45:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:45:47,070 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-12-22 12:45:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:45:47,112 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-22 12:45:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:45:47,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-12-22 12:45:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:45:47,114 INFO L225 Difference]: With dead ends: 36 [2021-12-22 12:45:47,114 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 12:45:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:45:47,115 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:45:47,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:45:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 12:45:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 12:45:47,119 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) [2021-12-22 12:45:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-22 12:45:47,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-22 12:45:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:45:47,121 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-22 12:45:47,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-12-22 12:45:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-22 12:45:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 12:45:47,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:45:47,122 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:45:47,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:45:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:45:47,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:45:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:45:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-12-22 12:45:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:45:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244334664] [2021-12-22 12:45:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:45:47,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:45:47,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 12:45:47,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072202177] [2021-12-22 12:45:47,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 12:45:47,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:45:47,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:45:47,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:45:47,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:45:52,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 12:45:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 12:45:52,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 12:45:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates...