./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_4+newton_2_3.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 a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:11:20,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:11:20,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:11:20,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:11:20,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:11:20,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:11:20,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:11:20,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:11:20,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:11:20,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:11:20,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:11:20,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:11:20,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:11:20,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:11:20,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:11:20,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:11:20,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:11:20,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:11:20,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:11:20,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:11:20,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:11:20,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:11:20,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:11:20,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:11:20,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:11:20,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:11:20,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:11:20,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:11:20,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:11:20,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:11:20,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:11:20,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:11:20,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:11:20,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:11:20,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:11:20,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:11:20,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:11:20,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:11:20,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:11:20,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:11:20,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:11:20,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:11:20,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:11:20,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:11:20,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:11:20,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:11:20,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:11:20,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:11:20,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:11:20,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:11:20,819 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:11:20,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:11:20,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:11:20,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:11:20,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:11:20,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:11:20,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:11:20,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:11:20,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:11:20,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:11:20,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:11:20,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:20,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:11:20,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:11:20,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:11:20,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:11:20,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:11:20,824 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:11:20,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:11:20,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:11:20,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 [2021-12-28 02:11:21,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:11:21,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:11:21,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:11:21,120 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:11:21,122 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:11:21,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-12-28 02:11:21,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae4bd09d/5dc4a3ef3eda4ba1bff79ad1f219c48d/FLAG15fa5c468 [2021-12-28 02:11:21,549 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:11:21,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-12-28 02:11:21,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae4bd09d/5dc4a3ef3eda4ba1bff79ad1f219c48d/FLAG15fa5c468 [2021-12-28 02:11:21,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae4bd09d/5dc4a3ef3eda4ba1bff79ad1f219c48d [2021-12-28 02:11:21,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:11:21,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:11:21,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:21,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:11:21,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:11:21,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110cc2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21, skipping insertion in model container [2021-12-28 02:11:21,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:11:21,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:11:21,710 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_4+newton_2_3.i[1224,1237] [2021-12-28 02:11:21,759 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_4+newton_2_3.i[2827,2840] [2021-12-28 02:11:21,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:21,769 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:11:21,781 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_4+newton_2_3.i[1224,1237] [2021-12-28 02:11:21,803 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_4+newton_2_3.i[2827,2840] [2021-12-28 02:11:21,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:21,812 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:11:21,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21 WrapperNode [2021-12-28 02:11:21,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:21,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:21,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:11:21,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:11:21,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,836 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2021-12-28 02:11:21,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:21,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:11:21,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:11:21,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:11:21,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:11:21,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:11:21,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:11:21,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:11:21,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (1/1) ... [2021-12-28 02:11:21,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:21,904 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) [2021-12-28 02:11:21,921 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 [2021-12-28 02:11:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:11:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-28 02:11:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-28 02:11:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-28 02:11:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-28 02:11:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:11:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:11:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:11:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 02:11:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 02:11:21,987 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:11:21,989 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:11:22,108 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:11:22,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:11:22,112 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 02:11:22,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:22 BoogieIcfgContainer [2021-12-28 02:11:22,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:11:22,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:11:22,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:11:22,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:11:22,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:11:21" (1/3) ... [2021-12-28 02:11:22,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715ebc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:22, skipping insertion in model container [2021-12-28 02:11:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:21" (2/3) ... [2021-12-28 02:11:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715ebc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:22, skipping insertion in model container [2021-12-28 02:11:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:22" (3/3) ... [2021-12-28 02:11:22,119 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_3.i [2021-12-28 02:11:22,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:11:22,122 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:11:22,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:11:22,189 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 [2021-12-28 02:11:22,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:11:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 02:11:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 02:11:22,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:22,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:22,231 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:22,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-28 02:11:22,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:22,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135106870] [2021-12-28 02:11:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:22,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:22,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135106870] [2021-12-28 02:11:22,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135106870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:22,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:22,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:22,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047853079] [2021-12-28 02:11:22,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:22,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:22,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:22,440 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:22,495 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-28 02:11:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 02:11:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:22,503 INFO L225 Difference]: With dead ends: 93 [2021-12-28 02:11:22,503 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 02:11:22,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:22,509 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:22,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 02:11:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-28 02:11:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-28 02:11:22,547 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-28 02:11:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:22,548 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-28 02:11:22,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-28 02:11:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 02:11:22,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:22,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:22,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:11:22,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-28 02:11:22,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:22,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350651785] [2021-12-28 02:11:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:22,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:22,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350651785] [2021-12-28 02:11:22,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350651785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:22,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:22,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:22,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336642892] [2021-12-28 02:11:22,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:22,616 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:22,630 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-28 02:11:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 02:11:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:22,633 INFO L225 Difference]: With dead ends: 52 [2021-12-28 02:11:22,634 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 02:11:22,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:22,637 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:22,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 02:11:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 02:11:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-28 02:11:22,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-28 02:11:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:22,647 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-28 02:11:22,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-28 02:11:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 02:11:22,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:22,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:22,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:11:22,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-28 02:11:22,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709706124] [2021-12-28 02:11:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:22,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:22,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:22,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191091916] [2021-12-28 02:11:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:22,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:22,673 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) [2021-12-28 02:11:22,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:11:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:11:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:22,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:22,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:22,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709706124] [2021-12-28 02:11:22,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:22,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191091916] [2021-12-28 02:11:22,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191091916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:22,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:22,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-28 02:11:22,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562713307] [2021-12-28 02:11:22,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:11:22,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:11:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:22,913 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:22,961 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-12-28 02:11:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:11:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-28 02:11:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:22,963 INFO L225 Difference]: With dead ends: 55 [2021-12-28 02:11:22,964 INFO L226 Difference]: Without dead ends: 42 [2021-12-28 02:11:22,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:22,965 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:22,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-28 02:11:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-28 02:11:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-28 02:11:22,972 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2021-12-28 02:11:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:22,972 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-28 02:11:22,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-28 02:11:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 02:11:22,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:22,973 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:22,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:11:23,191 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 [2021-12-28 02:11:23,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2021-12-28 02:11:23,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932042755] [2021-12-28 02:11:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:23,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:23,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981441148] [2021-12-28 02:11:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:23,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:23,202 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) [2021-12-28 02:11:23,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:11:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 02:11:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:23,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:23,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932042755] [2021-12-28 02:11:23,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:23,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981441148] [2021-12-28 02:11:23,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981441148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:23,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:23,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-28 02:11:23,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948022137] [2021-12-28 02:11:23,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:23,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:11:23,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:11:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:11:23,456 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:23,520 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-28 02:11:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:11:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-28 02:11:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:23,524 INFO L225 Difference]: With dead ends: 57 [2021-12-28 02:11:23,525 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 02:11:23,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:11:23,527 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:23,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 02:11:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 02:11:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-28 02:11:23,539 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2021-12-28 02:11:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:23,540 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-28 02:11:23,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-28 02:11:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 02:11:23,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:23,541 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:23,751 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 [2021-12-28 02:11:23,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-28 02:11:23,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629921818] [2021-12-28 02:11:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:23,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:23,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88956021] [2021-12-28 02:11:23,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 02:11:23,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:23,764 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) [2021-12-28 02:11:23,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:11:23,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 02:11:23,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:11:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 02:11:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:23,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:23,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629921818] [2021-12-28 02:11:23,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88956021] [2021-12-28 02:11:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88956021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:23,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:23,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-28 02:11:23,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814698693] [2021-12-28 02:11:23,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:23,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 02:11:23,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 02:11:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:11:23,979 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:24,046 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-12-28 02:11:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:11:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-28 02:11:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:24,049 INFO L225 Difference]: With dead ends: 65 [2021-12-28 02:11:24,049 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 02:11:24,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:11:24,050 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:24,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 02:11:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-28 02:11:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-12-28 02:11:24,061 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2021-12-28 02:11:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:24,062 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-12-28 02:11:24,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-12-28 02:11:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 02:11:24,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:24,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:24,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:24,276 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 [2021-12-28 02:11:24,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-12-28 02:11:24,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:24,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976393044] [2021-12-28 02:11:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:24,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 02:11:24,288 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-28 02:11:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 02:11:24,314 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-28 02:11:24,315 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-28 02:11:24,315 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-28 02:11:24,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-28 02:11:24,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:11:24,319 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-28 02:11:24,321 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 02:11:24,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 02:11:24 BoogieIcfgContainer [2021-12-28 02:11:24,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 02:11:24,342 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 02:11:24,342 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 02:11:24,343 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 02:11:24,343 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:22" (3/4) ... [2021-12-28 02:11:24,345 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-28 02:11:24,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 02:11:24,345 INFO L158 Benchmark]: Toolchain (without parser) took 2773.74ms. Allocated memory was 52.4MB in the beginning and 79.7MB in the end (delta: 27.3MB). Free memory was 31.1MB in the beginning and 45.0MB in the end (delta: -13.9MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-12-28 02:11:24,345 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:11:24,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.70ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.7MB in the beginning and 46.7MB in the end (delta: -16.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-28 02:11:24,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.75ms. Allocated memory is still 65.0MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:11:24,346 INFO L158 Benchmark]: Boogie Preprocessor took 41.15ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 43.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:11:24,346 INFO L158 Benchmark]: RCFGBuilder took 232.52ms. Allocated memory is still 65.0MB. Free memory was 43.7MB in the beginning and 33.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 02:11:24,346 INFO L158 Benchmark]: TraceAbstraction took 2227.27ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 32.6MB in the beginning and 45.6MB in the end (delta: -13.0MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2021-12-28 02:11:24,347 INFO L158 Benchmark]: Witness Printer took 2.57ms. Allocated memory is still 79.7MB. Free memory was 45.6MB in the beginning and 45.0MB in the end (delta: 573.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:11:24,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.70ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.7MB in the beginning and 46.7MB in the end (delta: -16.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.75ms. Allocated memory is still 65.0MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.15ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 43.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 232.52ms. Allocated memory is still 65.0MB. Free memory was 43.7MB in the beginning and 33.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2227.27ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 32.6MB in the beginning and 45.6MB in the end (delta: -13.0MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. * Witness Printer took 2.57ms. Allocated memory is still 79.7MB. Free memory was 45.6MB in the beginning and 45.0MB in the end (delta: 573.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L100] CALL, EXPR f(IN) VAL [\old(x)=53] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=53] [L100] CALL, EXPR fp(IN) VAL [\old(x)=53] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=53] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=54, IN=53, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=52, IN=53, x=51] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=53] [L109] reach_error() VAL [IN=53] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 755 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 561 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 154 IncrementalHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 194 mSDtfsCounter, 154 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 17 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-28 02:11:24,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_4+newton_2_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:11:25,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:11:25,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:11:25,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:11:25,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:11:25,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:11:25,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:11:25,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:11:25,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:11:25,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:11:25,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:11:25,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:11:25,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:11:25,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:11:25,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:11:25,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:11:25,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:11:25,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:11:25,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:11:25,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:11:25,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:11:25,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:11:25,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:11:25,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:11:25,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:11:25,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:11:25,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:11:25,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:11:25,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:11:25,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:11:25,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:11:25,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:11:25,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:11:25,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:11:25,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:11:25,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:11:25,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:11:25,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:11:25,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:11:25,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:11:25,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:11:25,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-28 02:11:26,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:11:26,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:11:26,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:11:26,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:11:26,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:11:26,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:11:26,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:11:26,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:11:26,028 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:11:26,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:11:26,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 02:11:26,029 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:11:26,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:11:26,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:11:26,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:11:26,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:26,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:11:26,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:11:26,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:11:26,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 02:11:26,037 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 [2021-12-28 02:11:26,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:11:26,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:11:26,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:11:26,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:11:26,305 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:11:26,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-12-28 02:11:26,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/805c5d720/fed960f2580c4f44ab886afe4a0493f5/FLAG0530046d7 [2021-12-28 02:11:26,726 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:11:26,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-12-28 02:11:26,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/805c5d720/fed960f2580c4f44ab886afe4a0493f5/FLAG0530046d7 [2021-12-28 02:11:26,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/805c5d720/fed960f2580c4f44ab886afe4a0493f5 [2021-12-28 02:11:26,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:11:26,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:11:26,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:26,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:11:26,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:11:26,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:26" (1/1) ... [2021-12-28 02:11:26,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b75ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:26, skipping insertion in model container [2021-12-28 02:11:26,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:26" (1/1) ... [2021-12-28 02:11:26,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:11:26,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:11:26,895 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_4+newton_2_3.i[1224,1237] [2021-12-28 02:11:26,945 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_4+newton_2_3.i[2827,2840] [2021-12-28 02:11:26,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:26,960 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:11:26,974 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_4+newton_2_3.i[1224,1237] [2021-12-28 02:11:26,992 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_4+newton_2_3.i[2827,2840] [2021-12-28 02:11:26,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:27,003 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:11:27,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27 WrapperNode [2021-12-28 02:11:27,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:27,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:27,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:11:27,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:11:27,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,046 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2021-12-28 02:11:27,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:27,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:11:27,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:11:27,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:11:27,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:11:27,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:11:27,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:11:27,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:11:27,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (1/1) ... [2021-12-28 02:11:27,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:27,110 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) [2021-12-28 02:11:27,113 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 [2021-12-28 02:11:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:11:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 02:11:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-28 02:11:27,137 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-28 02:11:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-28 02:11:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-28 02:11:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:11:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:11:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 02:11:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 02:11:27,183 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:11:27,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:11:35,794 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:11:35,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:11:35,798 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 02:11:35,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:35 BoogieIcfgContainer [2021-12-28 02:11:35,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:11:35,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:11:35,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:11:35,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:11:35,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:11:26" (1/3) ... [2021-12-28 02:11:35,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95c253a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:35, skipping insertion in model container [2021-12-28 02:11:35,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:27" (2/3) ... [2021-12-28 02:11:35,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95c253a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:35, skipping insertion in model container [2021-12-28 02:11:35,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:35" (3/3) ... [2021-12-28 02:11:35,805 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_3.i [2021-12-28 02:11:35,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:11:35,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:11:35,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:11:35,852 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 [2021-12-28 02:11:35,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:11:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 02:11:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 02:11:35,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:35,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:35,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-28 02:11:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:35,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550673951] [2021-12-28 02:11:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:35,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:35,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:35,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 02:11:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:11:35,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:36,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550673951] [2021-12-28 02:11:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550673951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:36,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:36,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676399317] [2021-12-28 02:11:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:36,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,123 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:36,203 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-28 02:11:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 02:11:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:36,210 INFO L225 Difference]: With dead ends: 93 [2021-12-28 02:11:36,210 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 02:11:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,220 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:36,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 02:11:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-28 02:11:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-28 02:11:36,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-28 02:11:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:36,255 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-28 02:11:36,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-28 02:11:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 02:11:36,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:36,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:36,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-28 02:11:36,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:36,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110817409] [2021-12-28 02:11:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:36,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:36,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 02:11:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:11:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:36,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110817409] [2021-12-28 02:11:36,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110817409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:36,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:36,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:36,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412434094] [2021-12-28 02:11:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:36,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:36,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,672 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:36,746 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-28 02:11:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 02:11:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:36,750 INFO L225 Difference]: With dead ends: 52 [2021-12-28 02:11:36,750 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 02:11:36,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,751 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:36,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 02:11:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 02:11:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-28 02:11:36,759 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-28 02:11:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:36,759 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-28 02:11:36,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-28 02:11:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 02:11:36,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:36,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:36,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-28 02:11:36,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:36,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768813618] [2021-12-28 02:11:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:36,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:36,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 02:11:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:11:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:37,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:37,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768813618] [2021-12-28 02:11:37,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768813618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:37,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:37,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:37,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263253461] [2021-12-28 02:11:37,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:37,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:37,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:37,311 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:37,389 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-28 02:11:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-28 02:11:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:37,390 INFO L225 Difference]: With dead ends: 53 [2021-12-28 02:11:37,390 INFO L226 Difference]: Without dead ends: 40 [2021-12-28 02:11:37,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:37,391 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:37,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-28 02:11:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-28 02:11:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-28 02:11:37,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2021-12-28 02:11:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:37,401 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-28 02:11:37,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-28 02:11:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 02:11:37,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:37,402 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:37,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-28 02:11:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:37,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2021-12-28 02:11:37,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:37,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494272758] [2021-12-28 02:11:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:37,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:37,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:37,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 02:11:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:11:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:38,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:38,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494272758] [2021-12-28 02:11:38,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494272758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:38,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:38,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-28 02:11:38,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096050669] [2021-12-28 02:11:38,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:38,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:11:38,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:11:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:38,391 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:38,603 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-28 02:11:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:11:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-28 02:11:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:38,605 INFO L225 Difference]: With dead ends: 57 [2021-12-28 02:11:38,605 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 02:11:38,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:38,606 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:38,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:11:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 02:11:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 02:11:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-28 02:11:38,611 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2021-12-28 02:11:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:38,611 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-28 02:11:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-28 02:11:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 02:11:38,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:38,612 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:38,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-28 02:11:38,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:38,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-28 02:11:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252227661] [2021-12-28 02:11:38,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 02:11:38,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:38,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:38,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 02:11:38,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 02:11:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:11:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 02:11:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 02:11:40,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 02:11:48,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252227661] [2021-12-28 02:11:48,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252227661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:48,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:48,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-28 02:11:48,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139841221] [2021-12-28 02:11:48,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:48,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 02:11:48,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 02:11:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:11:48,349 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:12:08,508 WARN L228 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-28 02:12:24,695 WARN L228 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-28 02:12:42,376 WARN L228 SmtUtils]: Spent 9.83s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)