./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_3_4.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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:13:02,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:13:02,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:13:02,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:13:02,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:13:02,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:13:02,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:13:02,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:13:02,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:13:02,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:13:02,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:13:02,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:13:02,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:13:02,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:13:02,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:13:02,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:13:02,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:13:02,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:13:02,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:13:02,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:13:02,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:13:02,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:13:02,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:13:02,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:13:02,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:13:02,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:13:02,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:13:02,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:13:02,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:13:02,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:13:02,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:13:02,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:13:02,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:13:02,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:13:02,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:13:02,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:13:02,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:13:02,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:13:02,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:13:02,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:13:02,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:13:02,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:13:02,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:13:02,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:13:02,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:13:02,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:13:02,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:13:02,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:13:02,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:13:02,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:13:02,897 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:13:02,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:13:02,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:13:02,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:13:02,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:13:02,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:13:02,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:13:02,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:13:02,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:13:02,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:13:02,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:13:02,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:13:02,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:13:02,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:13:02,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:13:02,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:13:02,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:02,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:13:02,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:13:02,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:13:02,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:13:02,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:13:02,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:13:02,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:13:02,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:13:02,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:13:02,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2021-12-16 02:13:03,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:13:03,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:13:03,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:13:03,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:13:03,168 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:13:03,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-12-16 02:13:03,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/395795376/8d7b0a2791464b66a5013bebee1311c0/FLAGd05e4e020 [2021-12-16 02:13:03,662 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:13:03,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-12-16 02:13:03,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/395795376/8d7b0a2791464b66a5013bebee1311c0/FLAGd05e4e020 [2021-12-16 02:13:03,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/395795376/8d7b0a2791464b66a5013bebee1311c0 [2021-12-16 02:13:03,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:13:03,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:13:03,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:03,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:13:03,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:13:03,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:03,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df70bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03, skipping insertion in model container [2021-12-16 02:13:03,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:03,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:13:03,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:13:03,872 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_3_4.i[1224,1237] [2021-12-16 02:13:03,924 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_3_4.i[2848,2861] [2021-12-16 02:13:03,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:03,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:13:03,955 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_3_4.i[1224,1237] [2021-12-16 02:13:03,977 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_3_4.i[2848,2861] [2021-12-16 02:13:03,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:03,992 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:13:03,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03 WrapperNode [2021-12-16 02:13:03,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:03,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:03,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:13:03,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:13:04,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,043 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2021-12-16 02:13:04,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:04,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:13:04,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:13:04,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:13:04,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:13:04,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:13:04,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:13:04,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:13:04,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (1/1) ... [2021-12-16 02:13:04,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:04,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:04,121 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) [2021-12-16 02:13:04,149 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 [2021-12-16 02:13:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:13:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-16 02:13:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-16 02:13:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-16 02:13:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-16 02:13:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:13:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:13:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:13:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 02:13:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 02:13:04,224 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:13:04,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:13:04,376 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:13:04,382 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:13:04,382 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 02:13:04,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:04 BoogieIcfgContainer [2021-12-16 02:13:04,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:13:04,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:13:04,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:13:04,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:13:04,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:13:03" (1/3) ... [2021-12-16 02:13:04,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135f55b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:04, skipping insertion in model container [2021-12-16 02:13:04,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:03" (2/3) ... [2021-12-16 02:13:04,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135f55b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:04, skipping insertion in model container [2021-12-16 02:13:04,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:04" (3/3) ... [2021-12-16 02:13:04,406 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2021-12-16 02:13:04,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:13:04,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:13:04,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:13:04,479 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 [2021-12-16 02:13:04,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:13:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 02:13:04,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:04,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:04,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:04,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-16 02:13:04,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:04,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373245511] [2021-12-16 02:13:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:04,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:04,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:04,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373245511] [2021-12-16 02:13:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373245511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:04,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:04,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:04,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292942472] [2021-12-16 02:13:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:04,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:04,737 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2021-12-16 02:13:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:04,800 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-16 02:13:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:04,802 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 [2021-12-16 02:13:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:04,808 INFO L225 Difference]: With dead ends: 99 [2021-12-16 02:13:04,808 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 02:13:04,811 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 [2021-12-16 02:13:04,815 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 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 [2021-12-16 02:13:04,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 02:13:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-16 02:13:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-16 02:13:04,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-16 02:13:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:04,858 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-16 02:13:04,859 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) [2021-12-16 02:13:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-16 02:13:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 02:13:04,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:04,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:04,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:13:04,861 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-16 02:13:04,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084821237] [2021-12-16 02:13:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:04,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:04,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:04,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084821237] [2021-12-16 02:13:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084821237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:04,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939202496] [2021-12-16 02:13:04,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:04,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:04,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:04,895 INFO L87 Difference]: Start difference. First operand 39 states and 47 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) [2021-12-16 02:13:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:04,914 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-16 02:13:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:04,914 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 [2021-12-16 02:13:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:04,915 INFO L225 Difference]: With dead ends: 55 [2021-12-16 02:13:04,915 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 02:13:04,916 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 [2021-12-16 02:13:04,917 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:04,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 02:13:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 02:13:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 02:13:04,929 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-16 02:13:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 02:13:04,930 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) [2021-12-16 02:13:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 02:13:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 02:13:04,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:04,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:04,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:13:04,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-16 02:13:04,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372107035] [2021-12-16 02:13:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:04,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:04,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:04,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787277797] [2021-12-16 02:13:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:04,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:04,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:04,964 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) [2021-12-16 02:13:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:13:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:13:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:05,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:05,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372107035] [2021-12-16 02:13:05,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787277797] [2021-12-16 02:13:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787277797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:05,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:05,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:05,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584858372] [2021-12-16 02:13:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:05,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:05,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:05,171 INFO L87 Difference]: Start difference. First operand 41 states and 49 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) [2021-12-16 02:13:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:05,192 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-16 02:13:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:05,193 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 [2021-12-16 02:13:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:05,194 INFO L225 Difference]: With dead ends: 56 [2021-12-16 02:13:05,194 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 02:13:05,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:05,196 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:05,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 02:13:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 02:13:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-16 02:13:05,206 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-16 02:13:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:05,207 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-16 02:13:05,207 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) [2021-12-16 02:13:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-16 02:13:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 02:13:05,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:05,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:05,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 02:13:05,411 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 [2021-12-16 02:13:05,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-16 02:13:05,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:05,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278856429] [2021-12-16 02:13:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:05,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:05,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063555545] [2021-12-16 02:13:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:05,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:05,432 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) [2021-12-16 02:13:05,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:13:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 02:13:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:05,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:05,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278856429] [2021-12-16 02:13:05,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063555545] [2021-12-16 02:13:05,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063555545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:05,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:05,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 02:13:05,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132643180] [2021-12-16 02:13:05,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:05,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:13:05,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:13:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:05,690 INFO L87 Difference]: Start difference. First operand 43 states and 51 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) [2021-12-16 02:13:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:05,739 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-16 02:13:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:13:05,740 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 [2021-12-16 02:13:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:05,741 INFO L225 Difference]: With dead ends: 60 [2021-12-16 02:13:05,741 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 02:13:05,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:13:05,742 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:05,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 189 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 02:13:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 02:13:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-16 02:13:05,749 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-16 02:13:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:05,750 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-16 02:13:05,750 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) [2021-12-16 02:13:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-16 02:13:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 02:13:05,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:05,751 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:05,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:05,951 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 [2021-12-16 02:13:05,952 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-16 02:13:05,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69078534] [2021-12-16 02:13:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:05,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:05,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:05,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733674255] [2021-12-16 02:13:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:13:05,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:05,968 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) [2021-12-16 02:13:05,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:13:06,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:13:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 02:13:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:06,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:06,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:06,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69078534] [2021-12-16 02:13:06,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:06,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733674255] [2021-12-16 02:13:06,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733674255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:06,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:06,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-16 02:13:06,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356823643] [2021-12-16 02:13:06,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:06,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 02:13:06,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 02:13:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:13:06,266 INFO L87 Difference]: Start difference. First operand 47 states and 55 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) [2021-12-16 02:13:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:06,365 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-16 02:13:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:13:06,366 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 [2021-12-16 02:13:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:06,369 INFO L225 Difference]: With dead ends: 68 [2021-12-16 02:13:06,369 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 02:13:06,370 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 [2021-12-16 02:13:06,371 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:06,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 02:13:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-16 02:13:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-16 02:13:06,391 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2021-12-16 02:13:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:06,392 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-16 02:13:06,392 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) [2021-12-16 02:13:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-16 02:13:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 02:13:06,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:06,393 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:06,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:06,595 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 [2021-12-16 02:13:06,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2021-12-16 02:13:06,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:06,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676095537] [2021-12-16 02:13:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:06,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:06,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:06,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688397976] [2021-12-16 02:13:06,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:13:06,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:06,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:06,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:06,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:13:06,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 02:13:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 02:13:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 02:13:06,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 02:13:07,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:07,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676095537] [2021-12-16 02:13:07,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:07,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688397976] [2021-12-16 02:13:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688397976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:07,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-16 02:13:07,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468930798] [2021-12-16 02:13:07,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 02:13:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 02:13:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:13:07,415 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:08,081 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-12-16 02:13:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:13:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 02:13:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:08,083 INFO L225 Difference]: With dead ends: 73 [2021-12-16 02:13:08,083 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 02:13:08,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-12-16 02:13:08,084 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:08,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 396 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 201 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2021-12-16 02:13:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 02:13:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-16 02:13:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-16 02:13:08,091 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 23 [2021-12-16 02:13:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:08,092 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-16 02:13:08,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-16 02:13:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 02:13:08,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:08,093 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:08,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:08,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:08,294 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2021-12-16 02:13:08,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:08,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135392910] [2021-12-16 02:13:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:08,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:08,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:08,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271155043] [2021-12-16 02:13:08,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:13:08,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:08,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:08,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:08,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:13:08,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:13:08,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 02:13:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:08,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:08,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135392910] [2021-12-16 02:13:08,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271155043] [2021-12-16 02:13:08,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271155043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:08,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:08,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 02:13:08,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957096952] [2021-12-16 02:13:08,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:08,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 02:13:08,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 02:13:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:13:08,607 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-12-16 02:13:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:08,846 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-12-16 02:13:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:13:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 25 [2021-12-16 02:13:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:08,849 INFO L225 Difference]: With dead ends: 96 [2021-12-16 02:13:08,849 INFO L226 Difference]: Without dead ends: 83 [2021-12-16 02:13:08,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:13:08,850 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-16 02:13:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-12-16 02:13:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-12-16 02:13:08,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 25 [2021-12-16 02:13:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:08,860 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-12-16 02:13:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-12-16 02:13:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-12-16 02:13:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 02:13:08,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:08,862 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:08,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:09,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:09,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2021-12-16 02:13:09,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657674153] [2021-12-16 02:13:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:09,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:09,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:09,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748134599] [2021-12-16 02:13:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:13:09,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:09,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:09,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:13:09,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 02:13:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 02:13:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:09,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657674153] [2021-12-16 02:13:09,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748134599] [2021-12-16 02:13:09,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748134599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:09,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:09,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 02:13:09,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357726352] [2021-12-16 02:13:09,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:09,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 02:13:09,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 02:13:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:13:09,757 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-12-16 02:13:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:09,822 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2021-12-16 02:13:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:13:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 27 [2021-12-16 02:13:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:09,824 INFO L225 Difference]: With dead ends: 91 [2021-12-16 02:13:09,824 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 02:13:09,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:13:09,825 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:09,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 374 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-12-16 02:13:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 02:13:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-16 02:13:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-16 02:13:09,832 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 27 [2021-12-16 02:13:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:09,833 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-16 02:13:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-12-16 02:13:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-16 02:13:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 02:13:09,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:09,834 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:09,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:10,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:10,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 474756785, now seen corresponding path program 6 times [2021-12-16 02:13:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059600561] [2021-12-16 02:13:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:10,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:10,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:10,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62156363] [2021-12-16 02:13:10,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 02:13:10,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:10,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:10,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:10,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:13:10,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 02:13:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:13:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 02:13:10,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:10,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:10,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059600561] [2021-12-16 02:13:10,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62156363] [2021-12-16 02:13:10,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62156363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:10,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:10,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:10,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703015189] [2021-12-16 02:13:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:10,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:10,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:10,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:10,141 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-16 02:13:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:10,149 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-12-16 02:13:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 27 [2021-12-16 02:13:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:10,151 INFO L225 Difference]: With dead ends: 90 [2021-12-16 02:13:10,151 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 02:13:10,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:10,152 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:10,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 02:13:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-16 02:13:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-16 02:13:10,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 27 [2021-12-16 02:13:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:10,159 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-16 02:13:10,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-16 02:13:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-16 02:13:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 02:13:10,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:10,160 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:10,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:10,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:10,373 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2021-12-16 02:13:10,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:10,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721665269] [2021-12-16 02:13:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:10,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:10,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:10,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121413311] [2021-12-16 02:13:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:10,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:10,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:10,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:13:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 02:13:10,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:13:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:13:11,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721665269] [2021-12-16 02:13:11,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121413311] [2021-12-16 02:13:11,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121413311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:11,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:11,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-16 02:13:11,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949936015] [2021-12-16 02:13:11,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 02:13:11,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 02:13:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:13:11,711 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:13:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:12,144 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-12-16 02:13:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:13:12,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-16 02:13:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:12,146 INFO L225 Difference]: With dead ends: 78 [2021-12-16 02:13:12,146 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 02:13:12,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-16 02:13:12,147 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:12,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 377 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 02:13:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-16 02:13:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-16 02:13:12,153 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 28 [2021-12-16 02:13:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:12,153 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-16 02:13:12,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:13:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-16 02:13:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 02:13:12,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:12,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:12,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:12,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 02:13:12,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-12-16 02:13:12,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:12,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106393301] [2021-12-16 02:13:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:12,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 02:13:12,389 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 02:13:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 02:13:12,410 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 02:13:12,411 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-16 02:13:12,412 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-16 02:13:12,413 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-16 02:13:12,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:13:12,416 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2021-12-16 02:13:12,418 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 02:13:12,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 02:13:12 BoogieIcfgContainer [2021-12-16 02:13:12,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 02:13:12,458 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 02:13:12,459 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 02:13:12,459 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 02:13:12,460 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:04" (3/4) ... [2021-12-16 02:13:12,462 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 02:13:12,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 02:13:12,463 INFO L158 Benchmark]: Toolchain (without parser) took 8778.76ms. Allocated memory was 90.2MB in the beginning and 159.4MB in the end (delta: 69.2MB). Free memory was 56.3MB in the beginning and 134.7MB in the end (delta: -78.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:12,463 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:12,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.38ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 56.1MB in the beginning and 106.5MB in the end (delta: -50.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 02:13:12,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.39ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 104.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 02:13:12,464 INFO L158 Benchmark]: Boogie Preprocessor took 41.72ms. Allocated memory is still 132.1MB. Free memory was 104.4MB in the beginning and 103.7MB in the end (delta: 705.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:12,465 INFO L158 Benchmark]: RCFGBuilder took 296.98ms. Allocated memory is still 132.1MB. Free memory was 103.0MB in the beginning and 91.8MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-16 02:13:12,465 INFO L158 Benchmark]: TraceAbstraction took 8056.41ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 91.1MB in the beginning and 46.7MB in the end (delta: 44.4MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. [2021-12-16 02:13:12,465 INFO L158 Benchmark]: Witness Printer took 4.16ms. Allocated memory is still 159.4MB. Free memory is still 134.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:12,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.38ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 56.1MB in the beginning and 106.5MB in the end (delta: -50.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.39ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 104.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.72ms. Allocated memory is still 132.1MB. Free memory was 104.4MB in the beginning and 103.7MB in the end (delta: 705.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 296.98ms. Allocated memory is still 132.1MB. Free memory was 103.0MB in the beginning and 91.8MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8056.41ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 91.1MB in the beginning and 46.7MB in the end (delta: 44.4MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. * Witness Printer took 4.16ms. Allocated memory is still 159.4MB. Free memory is still 134.7MB. 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 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L100] CALL, EXPR f(IN) VAL [\old(x)=57] [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)=57, x=57] [L100] RET, EXPR f(IN) VAL [f(IN)=49, IN=57] [L100] CALL, EXPR fp(IN) VAL [\old(x)=57] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=57, x=57] [L100] RET, EXPR fp(IN) VAL [f(IN)=49, fp(IN)=50, IN=57] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=52] [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)=52, x=52] [L102] RET, EXPR f(x) VAL [f(x)=51, IN=57, x=52] [L102] CALL, EXPR fp(x) VAL [\old(x)=52] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR fp(x) VAL [f(x)=51, fp(x)=53, IN=57, x=52] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=55] [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)=55, x=55] [L104] RET, EXPR f(x) VAL [f(x)=54, IN=57, x=55] [L104] CALL, EXPR fp(x) VAL [\old(x)=55] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=55, x=55] [L104] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=56, IN=57, x=55] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=57] [L109] reach_error() VAL [IN=57] - 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, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7.9s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 170 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 166 mSDsluCounter, 2212 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 53 IncrementalHoareTripleChecker+Unchecked, 1793 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 687 IncrementalHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 419 mSDtfsCounter, 687 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 75, 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, 10 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 241 NumberOfCodeBlocks, 231 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 332 ConstructedInterpolants, 21 QuantifiedInterpolants, 2133 SizeOfPredicates, 39 NumberOfNonLiveVariables, 617 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 128/364 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 [2021-12-16 02:13:12,489 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_3_4.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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:13:14,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:13:14,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:13:14,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:13:14,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:13:14,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:13:14,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:13:14,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:13:14,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:13:14,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:13:14,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:13:14,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:13:14,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:13:14,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:13:14,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:13:14,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:13:14,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:13:14,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:13:14,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:13:14,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:13:14,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:13:14,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:13:14,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:13:14,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:13:14,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:13:14,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:13:14,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:13:14,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:13:14,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:13:14,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:13:14,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:13:14,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:13:14,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:13:14,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:13:14,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:13:14,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:13:14,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:13:14,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:13:14,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:13:14,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:13:14,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:13:14,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-16 02:13:14,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:13:14,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:13:14,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:13:14,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:13:14,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:13:14,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:13:14,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:13:14,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:13:14,589 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:13:14,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:13:14,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:13:14,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:13:14,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:13:14,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:13:14,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:13:14,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:13:14,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 02:13:14,591 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 02:13:14,591 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 02:13:14,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:13:14,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:13:14,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:13:14,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:13:14,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:13:14,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:13:14,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:13:14,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:14,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:13:14,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:13:14,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:13:14,594 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 02:13:14,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 02:13:14,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:13:14,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:13:14,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:13:14,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:13:14,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 02:13:14,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2021-12-16 02:13:14,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:13:14,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:13:14,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:13:14,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:13:14,977 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:13:14,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-12-16 02:13:15,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0016ca515/6d2034036cb04e7fa6ab4aa649d596d6/FLAGae40af961 [2021-12-16 02:13:15,539 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:13:15,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-12-16 02:13:15,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0016ca515/6d2034036cb04e7fa6ab4aa649d596d6/FLAGae40af961 [2021-12-16 02:13:16,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0016ca515/6d2034036cb04e7fa6ab4aa649d596d6 [2021-12-16 02:13:16,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:13:16,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:13:16,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:16,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:13:16,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:13:16,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b047e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16, skipping insertion in model container [2021-12-16 02:13:16,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:13:16,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:13:16,207 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_3_4.i[1224,1237] [2021-12-16 02:13:16,234 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2021-12-16 02:13:16,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:16,260 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:13:16,282 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_3_4.i[1224,1237] [2021-12-16 02:13:16,292 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_3_4.i[2848,2861] [2021-12-16 02:13:16,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:16,305 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:13:16,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16 WrapperNode [2021-12-16 02:13:16,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:16,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:16,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:13:16,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:13:16,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,347 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2021-12-16 02:13:16,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:16,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:13:16,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:13:16,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:13:16,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:13:16,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:13:16,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:13:16,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:13:16,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (1/1) ... [2021-12-16 02:13:16,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:16,436 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) [2021-12-16 02:13:16,467 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 [2021-12-16 02:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 02:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-16 02:13:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-16 02:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-16 02:13:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-16 02:13:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:13:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:13:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 02:13:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 02:13:16,541 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:13:16,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:13:26,306 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:13:26,311 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:13:26,311 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 02:13:26,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:26 BoogieIcfgContainer [2021-12-16 02:13:26,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:13:26,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:13:26,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:13:26,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:13:26,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:13:16" (1/3) ... [2021-12-16 02:13:26,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe5fd09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:26, skipping insertion in model container [2021-12-16 02:13:26,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:16" (2/3) ... [2021-12-16 02:13:26,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe5fd09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:26, skipping insertion in model container [2021-12-16 02:13:26,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:26" (3/3) ... [2021-12-16 02:13:26,322 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2021-12-16 02:13:26,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:13:26,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:13:26,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:13:26,372 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 [2021-12-16 02:13:26,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:13:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 02:13:26,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:26,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:26,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-16 02:13:26,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:26,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801952838] [2021-12-16 02:13:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:26,415 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) [2021-12-16 02:13:26,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 02:13:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:13:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:26,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:26,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801952838] [2021-12-16 02:13:26,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801952838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:26,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:26,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:26,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269426497] [2021-12-16 02:13:26,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:26,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:26,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:26,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:26,717 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2021-12-16 02:13:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:26,812 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-16 02:13:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:26,815 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 [2021-12-16 02:13:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:26,820 INFO L225 Difference]: With dead ends: 99 [2021-12-16 02:13:26,820 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 02:13:26,823 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 [2021-12-16 02:13:26,825 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 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 [2021-12-16 02:13:26,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 02:13:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-16 02:13:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-16 02:13:26,855 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-16 02:13:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:26,855 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-16 02:13:26,855 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) [2021-12-16 02:13:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-16 02:13:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 02:13:26,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:26,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:26,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:27,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-16 02:13:27,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262543487] [2021-12-16 02:13:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:27,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:27,061 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) [2021-12-16 02:13:27,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 02:13:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:13:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:27,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:27,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262543487] [2021-12-16 02:13:27,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262543487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:27,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:27,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:27,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92123407] [2021-12-16 02:13:27,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:27,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:27,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:27,302 INFO L87 Difference]: Start difference. First operand 39 states and 47 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) [2021-12-16 02:13:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:27,386 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-16 02:13:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:27,388 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 [2021-12-16 02:13:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:27,388 INFO L225 Difference]: With dead ends: 55 [2021-12-16 02:13:27,388 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 02:13:27,389 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 [2021-12-16 02:13:27,390 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 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 [2021-12-16 02:13:27,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 02:13:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 02:13:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 02:13:27,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-16 02:13:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:27,404 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 02:13:27,405 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) [2021-12-16 02:13:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 02:13:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 02:13:27,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:27,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:27,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:27,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-16 02:13:27,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661154451] [2021-12-16 02:13:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:27,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:27,621 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) [2021-12-16 02:13:27,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 02:13:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:13:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:28,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:28,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661154451] [2021-12-16 02:13:28,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661154451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:28,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:28,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:28,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53697120] [2021-12-16 02:13:28,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:28,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:28,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:28,017 INFO L87 Difference]: Start difference. First operand 41 states and 49 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) [2021-12-16 02:13:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:28,107 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-16 02:13:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:28,108 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 [2021-12-16 02:13:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:28,109 INFO L225 Difference]: With dead ends: 56 [2021-12-16 02:13:28,109 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 02:13:28,109 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 [2021-12-16 02:13:28,110 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 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 [2021-12-16 02:13:28,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 02:13:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 02:13:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-16 02:13:28,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-16 02:13:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:28,117 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-16 02:13:28,117 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) [2021-12-16 02:13:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-16 02:13:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 02:13:28,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:28,118 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:28,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:28,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:28,339 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-16 02:13:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473671958] [2021-12-16 02:13:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:28,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:28,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:28,342 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) [2021-12-16 02:13:28,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 02:13:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 02:13:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:29,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:29,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473671958] [2021-12-16 02:13:29,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473671958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:29,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:29,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 02:13:29,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755992824] [2021-12-16 02:13:29,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:13:29,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:13:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:29,200 INFO L87 Difference]: Start difference. First operand 43 states and 51 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) [2021-12-16 02:13:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:29,431 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-16 02:13:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:13:29,432 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 [2021-12-16 02:13:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:29,433 INFO L225 Difference]: With dead ends: 60 [2021-12-16 02:13:29,433 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 02:13:29,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:29,434 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:29,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:13:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 02:13:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 02:13:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-16 02:13:29,441 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-16 02:13:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:29,441 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-16 02:13:29,441 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) [2021-12-16 02:13:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-16 02:13:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 02:13:29,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:29,442 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:29,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-16 02:13:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:29,644 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-16 02:13:29,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:29,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232269538] [2021-12-16 02:13:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:13:29,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:29,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:29,647 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) [2021-12-16 02:13:29,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 02:13:29,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:13:29,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 02:13:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:13:31,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:13:39,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:39,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232269538] [2021-12-16 02:13:39,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232269538] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:39,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:39,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 02:13:39,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572916583] [2021-12-16 02:13:39,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:39,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 02:13:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 02:13:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:13:39,156 INFO L87 Difference]: Start difference. First operand 47 states and 55 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) [2021-12-16 02:13:59,883 WARN L227 SmtUtils]: Spent 6.84s 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)