./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_3+newton_2_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 a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:53:18,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:53:18,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:53:18,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:53:18,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:53:18,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:53:18,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:53:18,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:53:18,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:53:18,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:53:18,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:53:18,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:53:18,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:53:18,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:53:18,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:53:18,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:53:18,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:53:18,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:53:18,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:53:18,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:53:18,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:53:18,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:53:18,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:53:18,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:53:18,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:53:18,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:53:18,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:53:18,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:53:18,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:53:18,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:53:18,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:53:18,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:53:18,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:53:18,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:53:18,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:53:18,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:53:18,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:53:18,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:53:18,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:53:18,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:53:18,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:53:18,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:53:18,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:53:18,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:53:18,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:53:18,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:53:18,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:53:18,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:53:18,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:53:18,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:53:18,787 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:53:18,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:53:18,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:53:18,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:53:18,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:53:18,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:53:18,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:53:18,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:53:18,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:53:18,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:53:18,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:53:18,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:53:18,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:53:18,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:53:18,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:53:18,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:53:18,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:53:18,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:53:18,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:53:18,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:53:18,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:53:18,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 [2021-12-17 19:53:18,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:53:19,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:53:19,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:53:19,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:53:19,020 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:53:19,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-12-17 19:53:19,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1b8cef8/837744ba64494661a3ebbb764e23e664/FLAG20ce0b3b9 [2021-12-17 19:53:19,411 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:53:19,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-12-17 19:53:19,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1b8cef8/837744ba64494661a3ebbb764e23e664/FLAG20ce0b3b9 [2021-12-17 19:53:19,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1b8cef8/837744ba64494661a3ebbb764e23e664 [2021-12-17 19:53:19,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:53:19,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:53:19,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:53:19,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:53:19,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:53:19,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1bb52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19, skipping insertion in model container [2021-12-17 19:53:19,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:53:19,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:53:19,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-12-17 19:53:19,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-12-17 19:53:19,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:53:19,668 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:53:19,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-12-17 19:53:19,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-12-17 19:53:19,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:53:19,712 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:53:19,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19 WrapperNode [2021-12-17 19:53:19,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:53:19,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:53:19,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:53:19,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:53:19,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,753 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-17 19:53:19,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:53:19,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:53:19,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:53:19,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:53:19,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:53:19,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:53:19,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:53:19,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:53:19,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (1/1) ... [2021-12-17 19:53:19,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:53:19,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:53:19,815 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) [2021-12-17 19:53:19,824 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 [2021-12-17 19:53:19,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:53:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-17 19:53:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-17 19:53:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-17 19:53:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-17 19:53:19,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:53:19,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:53:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:53:19,905 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:53:19,906 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:53:20,067 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:53:20,072 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:53:20,072 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 19:53:20,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:20 BoogieIcfgContainer [2021-12-17 19:53:20,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:53:20,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:53:20,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:53:20,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:53:20,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:53:19" (1/3) ... [2021-12-17 19:53:20,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4136b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:20, skipping insertion in model container [2021-12-17 19:53:20,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:19" (2/3) ... [2021-12-17 19:53:20,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4136b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:20, skipping insertion in model container [2021-12-17 19:53:20,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:20" (3/3) ... [2021-12-17 19:53:20,081 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_2.i [2021-12-17 19:53:20,084 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:53:20,084 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:53:20,148 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:53:20,156 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 [2021-12-17 19:53:20,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:53:20,171 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) [2021-12-17 19:53:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:53:20,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:53:20,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:53:20,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:53:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:53:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-17 19:53:20,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:53:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207297886] [2021-12-17 19:53:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:53:20,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:53:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:53:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:53:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:53:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207297886] [2021-12-17 19:53:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207297886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:53:20,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:53:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 19:53:20,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333178193] [2021-12-17 19:53:20,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:53:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 19:53:20,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:53:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 19:53:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 19:53:20,382 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) [2021-12-17 19:53:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:53:20,429 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-17 19:53:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 19:53:20,434 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 [2021-12-17 19:53:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:53:20,438 INFO L225 Difference]: With dead ends: 90 [2021-12-17 19:53:20,438 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 19:53:20,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 19:53:20,442 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:53:20,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:53:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 19:53:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-17 19:53:20,464 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) [2021-12-17 19:53:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-17 19:53:20,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-17 19:53:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:53:20,466 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-17 19:53:20,466 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) [2021-12-17 19:53:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-17 19:53:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:53:20,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:53:20,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:53:20,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:53:20,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:53:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:53:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-17 19:53:20,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:53:20,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590929248] [2021-12-17 19:53:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:53:20,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:53:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:53:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:53:20,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:53:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590929248] [2021-12-17 19:53:20,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590929248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:53:20,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:53:20,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:53:20,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050787955] [2021-12-17 19:53:20,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:53:20,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:53:20,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:53:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:53:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:53:20,530 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:53:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:53:20,576 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-17 19:53:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:53:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 19:53:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:53:20,577 INFO L225 Difference]: With dead ends: 36 [2021-12-17 19:53:20,577 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 19:53:20,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 19:53:20,579 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:53:20,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:53:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 19:53:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-17 19:53:20,583 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) [2021-12-17 19:53:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-17 19:53:20,583 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-17 19:53:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:53:20,584 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-17 19:53:20,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:53:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-17 19:53:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 19:53:20,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:53:20,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:53:20,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:53:20,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:53:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:53:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-17 19:53:20,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:53:20,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949668995] [2021-12-17 19:53:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:53:20,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:53:20,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:53:20,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967793350] [2021-12-17 19:53:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:53:20,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:53:20,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:53:20,596 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) [2021-12-17 19:53:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:53:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:53:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 19:53:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:53:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:53:53,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:54:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:54:00,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:54:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949668995] [2021-12-17 19:54:00,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:54:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967793350] [2021-12-17 19:54:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967793350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:54:00,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:54:00,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-17 19:54:00,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043439480] [2021-12-17 19:54:00,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:54:00,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 19:54:00,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:54:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 19:54:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=208, Unknown=10, NotChecked=0, Total=272 [2021-12-17 19:54:00,454 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:54:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:54:03,128 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-17 19:54:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:54:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 19:54:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:54:03,129 INFO L225 Difference]: With dead ends: 42 [2021-12-17 19:54:03,129 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 19:54:03,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=74, Invalid=257, Unknown=11, NotChecked=0, Total=342 [2021-12-17 19:54:03,130 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:54:03,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-17 19:54:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 19:54:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-17 19:54:03,133 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) [2021-12-17 19:54:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-17 19:54:03,134 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-17 19:54:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:54:03,134 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-17 19:54:03,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:54:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-17 19:54:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 19:54:03,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:54:03,135 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:54:03,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:54:03,336 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 [2021-12-17 19:54:03,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:54:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:54:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-17 19:54:03,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:54:03,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586116287] [2021-12-17 19:54:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:54:03,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:54:03,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:54:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334777089] [2021-12-17 19:54:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 19:54:03,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:54:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:54:03,357 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) [2021-12-17 19:54:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:54:03,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 19:54:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:54:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 19:54:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:54:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:54:06,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:54:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:54:23,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:54:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586116287] [2021-12-17 19:54:23,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:54:23,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334777089] [2021-12-17 19:54:23,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334777089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:54:23,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:54:23,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-17 19:54:23,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196918069] [2021-12-17 19:54:23,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:54:23,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 19:54:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:54:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 19:54:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=214, Unknown=5, NotChecked=0, Total=272 [2021-12-17 19:54:23,468 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:54:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:54:36,567 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-17 19:54:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 19:54:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 19:54:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:54:36,568 INFO L225 Difference]: With dead ends: 45 [2021-12-17 19:54:36,568 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 19:54:36,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=88, Invalid=365, Unknown=9, NotChecked=0, Total=462 [2021-12-17 19:54:36,569 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 19:54:36,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 251 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-12-17 19:54:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 19:54:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-17 19:54:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-12-17 19:54:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-17 19:54:36,572 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2021-12-17 19:54:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:54:36,572 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-17 19:54:36,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:54:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-17 19:54:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 19:54:36,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:54:36,573 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:54:36,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 19:54:36,779 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,SelfDestructingSolverStorable3 [2021-12-17 19:54:36,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:54:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:54:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-17 19:54:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:54:36,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967627207] [2021-12-17 19:54:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:54:36,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:54:36,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:54:36,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297548501] [2021-12-17 19:54:36,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 19:54:36,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:54:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:54:36,790 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) [2021-12-17 19:54:36,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:54:36,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 19:54:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:54:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 19:54:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:54:51,146 WARN L227 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:56:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:56:08,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:57:57,716 WARN L227 SmtUtils]: Spent 46.99s on a formula simplification. DAG size of input: 88 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:58:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:58:18,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:58:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967627207] [2021-12-17 19:58:18,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:58:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297548501] [2021-12-17 19:58:18,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297548501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:58:18,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:58:18,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-17 19:58:18,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815640253] [2021-12-17 19:58:18,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:58:18,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 19:58:18,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:58:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 19:58:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=310, Unknown=22, NotChecked=0, Total=420 [2021-12-17 19:58:18,018 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-17 19:58:56,158 WARN L227 SmtUtils]: Spent 22.93s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:59:24,885 WARN L227 SmtUtils]: Spent 13.85s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:59:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:59:27,111 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-17 19:59:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 19:59:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 14 [2021-12-17 19:59:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:59:27,112 INFO L225 Difference]: With dead ends: 48 [2021-12-17 19:59:27,112 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 19:59:27,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 220.2s TimeCoverageRelationStatistics Valid=119, Invalid=406, Unknown=27, NotChecked=0, Total=552 [2021-12-17 19:59:27,113 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:59:27,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 360 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-17 19:59:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 19:59:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-17 19:59:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-12-17 19:59:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-12-17 19:59:27,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-12-17 19:59:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:59:27,117 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-12-17 19:59:27,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-17 19:59:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-12-17 19:59:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 19:59:27,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:59:27,118 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:59:27,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 19:59:27,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:59:27,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:59:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:59:27,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1825995883, now seen corresponding path program 1 times [2021-12-17 19:59:27,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:59:27,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681937053] [2021-12-17 19:59:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:59:27,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:59:27,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:59:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897972058] [2021-12-17 19:59:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:59:27,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:59:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:59:27,344 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) [2021-12-17 19:59:27,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:59:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:59:27,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 19:59:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:00:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:00:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:01:28,696 WARN L227 SmtUtils]: Spent 39.85s on a formula simplification. DAG size of input: 56 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 20:04:42,365 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= 0 |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_29| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_29| 0) (< |v_ULTIMATE.start_gcd_test_~a#1_29| |c_ULTIMATE.start_gcd_test_~b#1|) (let ((.cse0 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (= 0 .cse0) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse14 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse12 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256))) (let ((.cse3 (<= .cse12 127)) (.cse2 (let ((.cse16 (+ .cse12 (- 256)))) (let ((.cse15 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) .cse14 (not (= 0 (mod (mod .cse16 .cse15) 256))))))) (.cse5 (< 127 .cse12)) (.cse4 (let ((.cse13 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse12) 256))) (or (not (= 0 (mod (mod .cse12 .cse13) 256))) .cse14 (<= .cse13 |c_ULTIMATE.start_main1_~x~0#1|) (= 0 .cse12)))) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse0) 256))) (and (or (let ((.cse1 (let ((.cse8 (+ .cse9 (- 256)))) (let ((.cse7 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse8) 256))) (or .cse6 (<= .cse7 |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod (mod .cse8 .cse7) 256)))))))) (and (or (and .cse1 .cse2) .cse3) (or (and .cse1 .cse4) .cse5))) (<= .cse9 127)) (or (let ((.cse10 (let ((.cse11 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse9) 256))) (or (= 0 .cse9) (<= .cse11 |c_ULTIMATE.start_main1_~x~0#1|) .cse6 (not (= 0 (mod (mod .cse9 .cse11) 256))))))) (and (or .cse3 (and .cse10 .cse2)) (or .cse5 (and .cse10 .cse4)))) (< 127 .cse9)))))) (or (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (let ((.cse17 (mod .cse0 256))) (and (let ((.cse18 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse17) 256))) (or (< 127 .cse17) (= 0 .cse17) (<= .cse18 |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod (mod .cse17 .cse18) 256))))) (let ((.cse19 (+ .cse17 (- 256)))) (let ((.cse20 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_29| .cse19) 256))) (or (not (= 0 (mod (mod .cse19 .cse20) 256))) (<= .cse17 127) (<= .cse20 |c_ULTIMATE.start_main1_~x~0#1|)))))))))))) is different from true Killed by 15