./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_3_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 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:08:04,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:08:04,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:08:04,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:08:04,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:08:04,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:08:04,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:08:04,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:08:04,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:08:04,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:08:04,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:08:04,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:08:04,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:08:04,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:08:04,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:08:04,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:08:04,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:08:04,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:08:04,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:08:04,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:08:04,764 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:08:04,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:08:04,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:08:04,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:08:04,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:08:04,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:08:04,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:08:04,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:08:04,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:08:04,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:08:04,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:08:04,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:08:04,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:08:04,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:08:04,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:08:04,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:08:04,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:08:04,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:08:04,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:08:04,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:08:04,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:08:04,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:08:04,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:08:04,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:08:04,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:08:04,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:08:04,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:08:04,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:08:04,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:08:04,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:08:04,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:08:04,818 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:08:04,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:08:04,819 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:08:04,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:08:04,820 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:08:04,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:08:04,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:08:04,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:08:04,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:08:04,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:08:04,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:08:04,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:08:04,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:08:04,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:08:04,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:08:04,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:08:04,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:08:04,824 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:08:04,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:08:04,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:08:04,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a [2022-07-22 20:08:05,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:08:05,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:08:05,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:08:05,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:08:05,089 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:08:05,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2022-07-22 20:08:05,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6d68990/bd597e1bf06b4a37845d476b36c19f57/FLAG2f05285dd [2022-07-22 20:08:05,614 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:08:05,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2022-07-22 20:08:05,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6d68990/bd597e1bf06b4a37845d476b36c19f57/FLAG2f05285dd [2022-07-22 20:08:05,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6d68990/bd597e1bf06b4a37845d476b36c19f57 [2022-07-22 20:08:05,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:08:05,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:08:05,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:08:05,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:08:05,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:08:05,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f794424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05, skipping insertion in model container [2022-07-22 20:08:05,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:08:05,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:08:05,781 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_3_8.i[1226,1239] [2022-07-22 20:08:05,804 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_3_8.i[2862,2875] [2022-07-22 20:08:05,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:08:05,821 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:08:05,832 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_3_8.i[1226,1239] [2022-07-22 20:08:05,842 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_3_8.i[2862,2875] [2022-07-22 20:08:05,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:08:05,853 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:08:05,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05 WrapperNode [2022-07-22 20:08:05,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:08:05,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:08:05,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:08:05,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:08:05,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,907 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-07-22 20:08:05,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:08:05,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:08:05,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:08:05,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:08:05,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:08:05,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:08:05,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:08:05,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:08:05,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (1/1) ... [2022-07-22 20:08:05,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:08:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:08:05,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 20:08:06,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 20:08:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:08:06,023 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-22 20:08:06,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-22 20:08:06,023 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-22 20:08:06,025 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-22 20:08:06,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:08:06,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:08:06,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:08:06,089 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:08:06,092 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:08:06,320 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:08:06,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:08:06,351 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 20:08:06,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:08:06 BoogieIcfgContainer [2022-07-22 20:08:06,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:08:06,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:08:06,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:08:06,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:08:06,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:08:05" (1/3) ... [2022-07-22 20:08:06,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15df36c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:08:06, skipping insertion in model container [2022-07-22 20:08:06,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:08:05" (2/3) ... [2022-07-22 20:08:06,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15df36c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:08:06, skipping insertion in model container [2022-07-22 20:08:06,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:08:06" (3/3) ... [2022-07-22 20:08:06,371 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_8.i [2022-07-22 20:08:06,383 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:08:06,399 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:08:06,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:08:06,464 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c086979, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@238ae25 [2022-07-22 20:08:06,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:08:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:08:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:08:06,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:08:06,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:08:06,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:08:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:08:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-22 20:08:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:08:06,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934045106] [2022-07-22 20:08:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:08:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:08:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:08:06,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:08:06,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934045106] [2022-07-22 20:08:06,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934045106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:08:06,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:08:06,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:08:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665762147] [2022-07-22 20:08:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:08:06,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:08:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:08:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:08:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:08:06,777 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:08:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:08:06,859 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-22 20:08:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:08:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 20:08:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:08:06,870 INFO L225 Difference]: With dead ends: 96 [2022-07-22 20:08:06,871 INFO L226 Difference]: Without dead ends: 39 [2022-07-22 20:08:06,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:08:06,881 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:08:06,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:08:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-22 20:08:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-22 20:08:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:08:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-22 20:08:06,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-07-22 20:08:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:08:06,926 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-22 20:08:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:08:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-22 20:08:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:08:06,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:08:06,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:08:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:08:06,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:08:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:08:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-22 20:08:06,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:08:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165228929] [2022-07-22 20:08:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:06,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:08:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:08:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:08:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:08:07,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165228929] [2022-07-22 20:08:07,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165228929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:08:07,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:08:07,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:08:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025209422] [2022-07-22 20:08:07,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:08:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:08:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:08:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:08:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:08:07,049 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:08:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:08:07,145 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-22 20:08:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:08:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 20:08:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:08:07,148 INFO L225 Difference]: With dead ends: 39 [2022-07-22 20:08:07,149 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 20:08:07,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:08:07,151 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:08:07,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:08:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 20:08:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-22 20:08:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:08:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-22 20:08:07,166 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-07-22 20:08:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:08:07,168 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-22 20:08:07,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:08:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-22 20:08:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 20:08:07,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:08:07,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:08:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:08:07,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:08:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:08:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-22 20:08:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:08:07,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846100141] [2022-07-22 20:08:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:08:07,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:08:07,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503258518] [2022-07-22 20:08:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:07,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:08:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:08:07,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:08:07,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:08:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:08:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 20:08:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:08:34,921 WARN L233 SmtUtils]: Spent 24.79s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:08:52,308 WARN L233 SmtUtils]: Spent 8.67s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:09:10,868 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 40 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:09:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:09:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:09:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:09:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:09:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846100141] [2022-07-22 20:09:36,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:09:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503258518] [2022-07-22 20:09:36,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503258518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:09:36,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:09:36,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-22 20:09:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816464606] [2022-07-22 20:09:36,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:09:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 20:09:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:09:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 20:09:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=199, Unknown=19, NotChecked=0, Total=272 [2022-07-22 20:09:36,700 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:09:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:09:36,989 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-22 20:09:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:09:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 20:09:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:09:36,991 INFO L225 Difference]: With dead ends: 41 [2022-07-22 20:09:36,991 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 20:09:36,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=63, Invalid=224, Unknown=19, NotChecked=0, Total=306 [2022-07-22 20:09:36,993 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:09:36,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-22 20:09:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 20:09:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-22 20:09:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:09:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-22 20:09:36,998 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-07-22 20:09:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:09:36,998 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-22 20:09:36,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:09:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-22 20:09:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 20:09:36,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:09:36,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:09:37,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 20:09:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:09:37,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:09:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:09:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2022-07-22 20:09:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:09:37,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95386118] [2022-07-22 20:09:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:09:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:09:37,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:09:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790117725] [2022-07-22 20:09:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:09:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:09:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:09:37,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:09:37,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:09:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:09:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 20:09:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:09:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:09:53,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:10:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:10:01,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:10:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95386118] [2022-07-22 20:10:01,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:10:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790117725] [2022-07-22 20:10:01,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790117725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:10:01,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:10:01,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-22 20:10:01,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881535348] [2022-07-22 20:10:01,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:10:01,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 20:10:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:10:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 20:10:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=179, Unknown=8, NotChecked=0, Total=240 [2022-07-22 20:10:01,402 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:10:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:10:02,151 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-07-22 20:10:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:10:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 20:10:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:10:02,152 INFO L225 Difference]: With dead ends: 46 [2022-07-22 20:10:02,152 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 20:10:02,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=62, Invalid=202, Unknown=8, NotChecked=0, Total=272 [2022-07-22 20:10:02,154 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:10:02,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-07-22 20:10:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 20:10:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-22 20:10:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:10:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-22 20:10:02,159 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-07-22 20:10:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:10:02,159 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-22 20:10:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:10:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-22 20:10:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 20:10:02,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:10:02,161 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:10:02,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 20:10:02,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 20:10:02,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:10:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:10:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-07-22 20:10:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:10:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273421007] [2022-07-22 20:10:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:10:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:10:02,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:10:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315820534] [2022-07-22 20:10:02,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 20:10:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:10:02,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:10:02,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:10:02,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:10:02,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 20:10:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:10:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 20:10:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:10:59,415 WARN L233 SmtUtils]: Spent 25.56s on a formula simplification. DAG size of input: 89 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:11:19,555 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 66 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:11:52,088 WARN L233 SmtUtils]: Spent 7.80s 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) [2022-07-22 20:12:09,721 WARN L233 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:12:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:12:14,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:12:43,172 WARN L855 $PredicateComparison]: unable to prove that (or (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse23 (mod (+ .cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse21 (mod .cse20 256)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse14 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse17 (<= .cse23 127)) (.cse7 (<= .cse22 127))) (let ((.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0))) (.cse8 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse2 (not .cse7)) (.cse9 (not .cse17)) (.cse0 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 0))) (.cse3 (not .cse14)) (.cse4 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (not .cse6)) (.cse10 (<= .cse21 127))) (and (or (and (or .cse0 .cse1 .cse2 .cse3 .cse4) (or (and (or .cse5 .cse6 .cse7 .cse3 .cse8) (or .cse2 (and (or .cse0 .cse1 .cse3 .cse4) (or .cse5 .cse6 .cse3 .cse8)))) .cse9)) .cse10) (or (let ((.cse15 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256) 0)))) (let ((.cse18 (or .cse14 .cse15 .cse16)) (.cse19 (= .cse20 0))) (let ((.cse13 (or .cse14 .cse1 .cse15 .cse16)) (.cse12 (or .cse1 (and .cse18 (or .cse0 .cse19 .cse3 .cse4))))) (and (or (let ((.cse11 (or .cse14 .cse15 .cse6 .cse16))) (and (or (and .cse11 .cse12) .cse2) (or (and .cse13 .cse11) .cse7))) .cse17) (or (and (or .cse7 (and .cse13 (or .cse6 (and .cse18 (or .cse19 .cse5 .cse3 .cse8))))) (or (and (or .cse6 (and .cse18 (or .cse5 .cse3 .cse8))) .cse12) .cse2)) .cse9))))) (not .cse10))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true