./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:04:32,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:04:32,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:04:32,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:04:32,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:04:32,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:04:32,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:04:32,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:04:32,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:04:32,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:04:32,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:04:32,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:04:32,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:04:32,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:04:32,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:04:32,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:04:32,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:04:32,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:04:32,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:04:32,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:04:32,568 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:04:32,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:04:32,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:04:32,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:04:32,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:04:32,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:04:32,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:04:32,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:04:32,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:04:32,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:04:32,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:04:32,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:04:32,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:04:32,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:04:32,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:04:32,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:04:32,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:04:32,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:04:32,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:04:32,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:04:32,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:04:32,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:04:32,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:04:32,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:04:32,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:04:32,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:04:32,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:04:32,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:04:32,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:04:32,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:04:32,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:04:32,623 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:04:32,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:04:32,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:04:32,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:04:32,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:04:32,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:04:32,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:04:32,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:04:32,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:04:32,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:04:32,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:04:32,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:04:32,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:04:32,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:04:32,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:04:32,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:04:32,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:04:32,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:04:32,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:04:32,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:04:32,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:04:32,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:04:32,628 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:04:32,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:04:32,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:04:32,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2022-07-22 21:04:32,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:04:32,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:04:32,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:04:32,846 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:04:32,847 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:04:32,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:32,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4761e389e/75cdd87e77474b479f9a44e311265122/FLAGc13de72a4 [2022-07-22 21:04:33,259 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:04:33,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:33,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4761e389e/75cdd87e77474b479f9a44e311265122/FLAGc13de72a4 [2022-07-22 21:04:33,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4761e389e/75cdd87e77474b479f9a44e311265122 [2022-07-22 21:04:33,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:04:33,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:04:33,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:04:33,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:04:33,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:04:33,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:04:33" (1/1) ... [2022-07-22 21:04:33,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1563a288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:33, skipping insertion in model container [2022-07-22 21:04:33,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:04:33" (1/1) ... [2022-07-22 21:04:33,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:04:33,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:04:33,850 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/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:04:33,854 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/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:04:33,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:04:33,913 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:04:33,935 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/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:04:33,938 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/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:04:33,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:04:34,002 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:04:34,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34 WrapperNode [2022-07-22 21:04:34,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:04:34,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:04:34,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:04:34,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:04:34,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,054 INFO L137 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-07-22 21:04:34,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:04:34,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:04:34,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:04:34,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:04:34,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:04:34,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:04:34,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:04:34,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:04:34,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (1/1) ... [2022-07-22 21:04:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:04:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:04:34,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:04:34,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:04:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:04:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:04:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:04:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 21:04:34,167 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 21:04:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:04:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:04:34,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:04:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:04:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:04:34,230 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:04:34,233 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:04:34,528 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:04:34,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:04:34,536 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:04:34,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:04:34 BoogieIcfgContainer [2022-07-22 21:04:34,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:04:34,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:04:34,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:04:34,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:04:34,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:04:33" (1/3) ... [2022-07-22 21:04:34,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fc4bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:04:34, skipping insertion in model container [2022-07-22 21:04:34,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:34" (2/3) ... [2022-07-22 21:04:34,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fc4bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:04:34, skipping insertion in model container [2022-07-22 21:04:34,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:04:34" (3/3) ... [2022-07-22 21:04:34,548 INFO L111 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:34,583 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:04:34,583 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:04:34,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:04:34,663 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ccda231, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25638f75 [2022-07-22 21:04:34,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:04:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 85 states have internal predecessors, (139), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:04:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:04:34,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:04:34,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:04:34,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:04:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:04:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -685161840, now seen corresponding path program 1 times [2022-07-22 21:04:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:04:34,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693995194] [2022-07-22 21:04:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:04:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:04:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:04:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:04:34,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:04:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693995194] [2022-07-22 21:04:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693995194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:04:34,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:04:34,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:04:34,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127461800] [2022-07-22 21:04:34,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:04:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:04:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:04:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:04:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:04:34,819 INFO L87 Difference]: Start difference. First operand has 97 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 85 states have internal predecessors, (139), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:04:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:04:34,849 INFO L93 Difference]: Finished difference Result 189 states and 310 transitions. [2022-07-22 21:04:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:04:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:04:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:04:34,859 INFO L225 Difference]: With dead ends: 189 [2022-07-22 21:04:34,859 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 21:04:34,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:04:34,866 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 21:04:34,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:04:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 21:04:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-22 21:04:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 79 states have internal predecessors, (111), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:04:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2022-07-22 21:04:34,905 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 7 [2022-07-22 21:04:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:04:34,905 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2022-07-22 21:04:34,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:04:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2022-07-22 21:04:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:04:34,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:04:34,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:04:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:04:34,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:04:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:04:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash -685102258, now seen corresponding path program 1 times [2022-07-22 21:04:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:04:34,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484578033] [2022-07-22 21:04:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:04:34,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:04:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:04:34,927 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:04:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:04:34,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:04:34,952 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:04:34,953 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 21:04:34,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:04:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:04:34,958 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:04:34,961 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:04:34,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:04:34 BoogieIcfgContainer [2022-07-22 21:04:34,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:04:34,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:04:34,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:04:34,978 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:04:34,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:04:34" (3/4) ... [2022-07-22 21:04:34,980 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 21:04:34,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:04:34,981 INFO L158 Benchmark]: Toolchain (without parser) took 1309.42ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 78.4MB in the beginning and 84.8MB in the end (delta: -6.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-07-22 21:04:34,982 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 63.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:04:34,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.19ms. Allocated memory is still 109.1MB. Free memory was 78.1MB in the beginning and 79.0MB in the end (delta: -902.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 21:04:34,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.63ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 77.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:04:34,983 INFO L158 Benchmark]: Boogie Preprocessor took 38.79ms. Allocated memory is still 109.1MB. Free memory was 77.1MB in the beginning and 75.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:04:34,983 INFO L158 Benchmark]: RCFGBuilder took 442.52ms. Allocated memory is still 109.1MB. Free memory was 75.3MB in the beginning and 57.7MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-22 21:04:34,984 INFO L158 Benchmark]: TraceAbstraction took 436.61ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 56.9MB in the beginning and 85.5MB in the end (delta: -28.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:04:34,984 INFO L158 Benchmark]: Witness Printer took 3.28ms. Allocated memory is still 132.1MB. Free memory was 85.5MB in the beginning and 84.8MB in the end (delta: 650.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:04:34,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 63.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.19ms. Allocated memory is still 109.1MB. Free memory was 78.1MB in the beginning and 79.0MB in the end (delta: -902.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.63ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 77.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.79ms. Allocated memory is still 109.1MB. Free memory was 77.1MB in the beginning and 75.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 442.52ms. Allocated memory is still 109.1MB. Free memory was 75.3MB in the beginning and 57.7MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 436.61ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 56.9MB in the beginning and 85.5MB in the end (delta: -28.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.28ms. Allocated memory is still 132.1MB. Free memory was 85.5MB in the beginning and 84.8MB in the end (delta: 650.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.4f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: 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, 97 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 134 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 [2022-07-22 21:04:35,023 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/square_7+soft_float_4-2a.c.cil.c -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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:04:36,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:04:36,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:04:36,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:04:36,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:04:36,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:04:36,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:04:36,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:04:36,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:04:36,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:04:36,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:04:36,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:04:36,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:04:36,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:04:36,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:04:36,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:04:36,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:04:36,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:04:36,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:04:36,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:04:36,998 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:04:36,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:04:36,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:04:37,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:04:37,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:04:37,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:04:37,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:04:37,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:04:37,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:04:37,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:04:37,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:04:37,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:04:37,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:04:37,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:04:37,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:04:37,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:04:37,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:04:37,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:04:37,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:04:37,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:04:37,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:04:37,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:04:37,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 21:04:37,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:04:37,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:04:37,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:04:37,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:04:37,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:04:37,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:04:37,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:04:37,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:04:37,037 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:04:37,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:04:37,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:04:37,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:04:37,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:04:37,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:04:37,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:04:37,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:04:37,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 21:04:37,039 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 21:04:37,039 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 21:04:37,039 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:04:37,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:04:37,040 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:04:37,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:04:37,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:04:37,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:04:37,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:04:37,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:04:37,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:04:37,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:04:37,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:04:37,042 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 21:04:37,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 21:04:37,043 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:04:37,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:04:37,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:04:37,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 21:04:37,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2022-07-22 21:04:37,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:04:37,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:04:37,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:04:37,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:04:37,363 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:04:37,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:37,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6231fed4/f6e2a74e0a2a4caab00bce9b42bdd5c3/FLAG1e57e40d7 [2022-07-22 21:04:37,896 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:04:37,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:37,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6231fed4/f6e2a74e0a2a4caab00bce9b42bdd5c3/FLAG1e57e40d7 [2022-07-22 21:04:38,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6231fed4/f6e2a74e0a2a4caab00bce9b42bdd5c3 [2022-07-22 21:04:38,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:04:38,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:04:38,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:04:38,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:04:38,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:04:38,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18417a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38, skipping insertion in model container [2022-07-22 21:04:38,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:04:38,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:04:38,463 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/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:04:38,470 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/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:04:38,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:04:38,551 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:04:38,574 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/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:04:38,576 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/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:04:38,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:04:38,629 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:04:38,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38 WrapperNode [2022-07-22 21:04:38,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:04:38,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:04:38,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:04:38,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:04:38,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,680 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2022-07-22 21:04:38,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:04:38,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:04:38,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:04:38,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:04:38,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:04:38,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:04:38,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:04:38,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:04:38,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (1/1) ... [2022-07-22 21:04:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:04:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:04:38,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:04:38,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:04:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:04:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 21:04:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:04:38,808 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:04:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 21:04:38,808 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 21:04:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:04:38,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:04:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:04:38,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:04:38,911 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:04:38,913 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:04:41,419 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:04:41,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:04:41,430 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:04:41,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:04:41 BoogieIcfgContainer [2022-07-22 21:04:41,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:04:41,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:04:41,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:04:41,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:04:41,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:04:38" (1/3) ... [2022-07-22 21:04:41,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49415071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:04:41, skipping insertion in model container [2022-07-22 21:04:41,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:04:38" (2/3) ... [2022-07-22 21:04:41,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49415071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:04:41, skipping insertion in model container [2022-07-22 21:04:41,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:04:41" (3/3) ... [2022-07-22 21:04:41,439 INFO L111 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2022-07-22 21:04:41,451 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:04:41,451 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:04:41,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:04:41,498 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3743685b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19195f05 [2022-07-22 21:04:41,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:04:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:04:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:04:41,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:04:41,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:04:41,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:04:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:04:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-07-22 21:04:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:04:41,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7361424] [2022-07-22 21:04:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:04:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:04:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:04:41,531 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) [2022-07-22 21:04:41,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 21:04:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:04:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 21:04:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:04:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:04:41,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:04:41,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:04:41,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7361424] [2022-07-22 21:04:41,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7361424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:04:41,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:04:41,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:04:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217464017] [2022-07-22 21:04:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:04:41,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:04:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:04:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:04:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:04:41,957 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:04:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:04:41,981 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2022-07-22 21:04:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:04:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:04:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:04:41,993 INFO L225 Difference]: With dead ends: 121 [2022-07-22 21:04:41,993 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 21:04:41,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:04:42,003 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 21:04:42,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:04:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 21:04:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-22 21:04:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:04:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-07-22 21:04:42,054 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2022-07-22 21:04:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:04:42,055 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-07-22 21:04:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:04:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-07-22 21:04:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:04:42,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:04:42,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:04:42,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:04:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:04:42,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:04:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:04:42,278 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-07-22 21:04:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:04:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685023005] [2022-07-22 21:04:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:04:42,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:04:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:04:42,281 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) [2022-07-22 21:04:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 21:07:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:07:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:07:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:07:37,219 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-22 21:08:10,777 WARN L833 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from false [2022-07-22 21:08:12,854 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from true [2022-07-22 21:08:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:12,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:12,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685023005] [2022-07-22 21:08:12,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685023005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:12,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:12,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:08:12,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656459644] [2022-07-22 21:08:12,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:08:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:08:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-07-22 21:08:12,858 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:08:15,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 21:08:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:15,727 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-07-22 21:08:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:08:15,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:08:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:15,729 INFO L225 Difference]: With dead ends: 56 [2022-07-22 21:08:15,729 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 21:08:15,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-07-22 21:08:15,730 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:15,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 141 Unchecked, 2.6s Time] [2022-07-22 21:08:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 21:08:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 21:08:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:08:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-07-22 21:08:15,737 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2022-07-22 21:08:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:15,737 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-07-22 21:08:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:08:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-07-22 21:08:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 21:08:15,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:15,739 INFO L195 NwaCegarLoop]: 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] [2022-07-22 21:08:15,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:15,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1078958274, now seen corresponding path program 1 times [2022-07-22 21:08:15,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:15,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586081046] [2022-07-22 21:08:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:15,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:15,944 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) [2022-07-22 21:08:15,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 21:08:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:08:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:08:16,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:16,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586081046] [2022-07-22 21:08:16,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586081046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:16,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:16,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:08:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043535083] [2022-07-22 21:08:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:08:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:08:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:16,496 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:17,186 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2022-07-22 21:08:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:08:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-07-22 21:08:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:17,189 INFO L225 Difference]: With dead ends: 100 [2022-07-22 21:08:17,189 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 21:08:17,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:08:17,191 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:17,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 425 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:08:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 21:08:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-07-22 21:08:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 21:08:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-07-22 21:08:17,202 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 32 [2022-07-22 21:08:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:17,202 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-07-22 21:08:17,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-07-22 21:08:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 21:08:17,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:17,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:17,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:17,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash 452521591, now seen corresponding path program 1 times [2022-07-22 21:08:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643771093] [2022-07-22 21:08:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:17,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:17,418 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) [2022-07-22 21:08:17,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 21:08:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:08:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:08:18,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:08:18,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643771093] [2022-07-22 21:08:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643771093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:18,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:18,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-22 21:08:18,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938196380] [2022-07-22 21:08:18,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:18,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:08:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:08:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:08:18,408 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:08:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:19,351 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2022-07-22 21:08:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:08:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-22 21:08:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:19,353 INFO L225 Difference]: With dead ends: 122 [2022-07-22 21:08:19,353 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 21:08:19,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:08:19,355 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:19,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 492 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:08:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 21:08:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-07-22 21:08:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-22 21:08:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-07-22 21:08:19,365 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2022-07-22 21:08:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:19,365 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-07-22 21:08:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:08:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-07-22 21:08:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:08:19,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:19,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:19,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:19,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1328087799, now seen corresponding path program 1 times [2022-07-22 21:08:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368403115] [2022-07-22 21:08:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:19,580 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) [2022-07-22 21:08:19,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 21:08:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:08:19,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:08:20,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:08:20,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368403115] [2022-07-22 21:08:20,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368403115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:20,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:20,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 21:08:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879652303] [2022-07-22 21:08:20,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:20,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:08:20,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:08:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:20,566 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:08:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:21,240 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2022-07-22 21:08:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:08:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-07-22 21:08:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:21,249 INFO L225 Difference]: With dead ends: 114 [2022-07-22 21:08:21,249 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 21:08:21,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:08:21,250 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:21,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 462 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:08:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 21:08:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-22 21:08:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 21:08:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-07-22 21:08:21,269 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 40 [2022-07-22 21:08:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:21,271 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-07-22 21:08:21,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:08:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-07-22 21:08:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:08:21,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:21,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:21,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:21,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 78255138, now seen corresponding path program 2 times [2022-07-22 21:08:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:21,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071431174] [2022-07-22 21:08:21,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:08:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:21,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:21,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 21:08:21,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:08:21,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:08:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:08:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:08:22,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:22,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071431174] [2022-07-22 21:08:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071431174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:22,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:08:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773572372] [2022-07-22 21:08:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:08:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:08:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:08:22,007 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:22,392 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-07-22 21:08:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:08:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 21:08:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:22,394 INFO L225 Difference]: With dead ends: 97 [2022-07-22 21:08:22,394 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 21:08:22,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:22,395 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 9 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:22,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 336 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-07-22 21:08:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 21:08:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-07-22 21:08:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 68 states have internal predecessors, (81), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-22 21:08:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2022-07-22 21:08:22,407 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 40 [2022-07-22 21:08:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:22,413 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2022-07-22 21:08:22,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2022-07-22 21:08:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:08:22,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:22,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:22,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:22,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 135513440, now seen corresponding path program 1 times [2022-07-22 21:08:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315111654] [2022-07-22 21:08:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:22,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:22,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:22,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 21:08:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:08:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:08:23,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:23,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:23,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315111654] [2022-07-22 21:08:23,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315111654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:23,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:23,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:08:23,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654064317] [2022-07-22 21:08:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:23,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:08:23,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:08:23,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:08:23,194 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:23,563 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-07-22 21:08:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:08:23,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 21:08:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:23,565 INFO L225 Difference]: With dead ends: 97 [2022-07-22 21:08:23,566 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 21:08:23,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:23,567 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:23,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 309 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-07-22 21:08:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 21:08:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-07-22 21:08:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 21:08:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-07-22 21:08:23,585 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 40 [2022-07-22 21:08:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:23,586 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-07-22 21:08:23,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:08:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-07-22 21:08:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:08:23,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:23,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:23,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:23,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1165006364, now seen corresponding path program 1 times [2022-07-22 21:08:23,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:23,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972071006] [2022-07-22 21:08:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:23,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:23,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:23,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:23,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 21:08:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:08:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:08:24,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:24,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972071006] [2022-07-22 21:08:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972071006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:24,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 21:08:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845930392] [2022-07-22 21:08:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:08:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:08:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:08:24,790 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:08:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:26,776 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-07-22 21:08:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:08:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-07-22 21:08:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:26,778 INFO L225 Difference]: With dead ends: 127 [2022-07-22 21:08:26,778 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 21:08:26,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:08:26,779 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:26,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 572 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 21:08:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 21:08:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2022-07-22 21:08:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 77 states have internal predecessors, (92), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-22 21:08:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2022-07-22 21:08:26,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 45 [2022-07-22 21:08:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:26,794 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2022-07-22 21:08:26,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:08:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2022-07-22 21:08:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 21:08:26,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:26,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:26,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:27,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1862719454, now seen corresponding path program 1 times [2022-07-22 21:08:27,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:27,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102226260] [2022-07-22 21:08:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:27,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:27,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 21:08:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:08:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:08:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:08:29,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102226260] [2022-07-22 21:08:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102226260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:29,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-07-22 21:08:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111808976] [2022-07-22 21:08:29,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:08:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:08:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:08:29,281 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:08:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:31,388 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2022-07-22 21:08:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:08:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-07-22 21:08:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:31,391 INFO L225 Difference]: With dead ends: 134 [2022-07-22 21:08:31,391 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 21:08:31,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:08:31,392 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 53 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:31,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 662 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 21:08:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 21:08:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-07-22 21:08:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-22 21:08:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-07-22 21:08:31,402 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 47 [2022-07-22 21:08:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:31,403 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-07-22 21:08:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:08:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-07-22 21:08:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 21:08:31,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:31,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:31,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:31,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:31,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:31,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1805461152, now seen corresponding path program 1 times [2022-07-22 21:08:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:31,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722250216] [2022-07-22 21:08:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:31,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:31,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:31,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 21:08:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:08:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 21:08:31,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:31,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722250216] [2022-07-22 21:08:31,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722250216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:31,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:31,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:08:31,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932360611] [2022-07-22 21:08:31,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:08:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:31,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:08:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:08:31,913 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:08:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:32,223 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2022-07-22 21:08:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:08:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-07-22 21:08:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:32,224 INFO L225 Difference]: With dead ends: 120 [2022-07-22 21:08:32,224 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 21:08:32,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:32,226 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:32,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 21:08:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 21:08:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-22 21:08:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-22 21:08:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2022-07-22 21:08:32,234 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 47 [2022-07-22 21:08:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:32,235 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2022-07-22 21:08:32,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:08:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2022-07-22 21:08:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 21:08:32,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:32,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:32,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:32,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:32,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2144611077, now seen corresponding path program 1 times [2022-07-22 21:08:32,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:32,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098711409] [2022-07-22 21:08:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:32,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:32,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:32,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 21:08:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:08:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:36,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098711409] [2022-07-22 21:08:36,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098711409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:36,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:36,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 21:08:36,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573171734] [2022-07-22 21:08:36,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:08:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:08:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:08:36,889 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:08:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:43,627 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2022-07-22 21:08:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:08:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-07-22 21:08:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:43,630 INFO L225 Difference]: With dead ends: 152 [2022-07-22 21:08:43,630 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 21:08:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 21:08:43,631 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 140 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:43,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1029 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 21:08:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 21:08:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2022-07-22 21:08:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-22 21:08:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2022-07-22 21:08:43,640 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 49 [2022-07-22 21:08:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:43,641 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2022-07-22 21:08:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:08:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2022-07-22 21:08:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 21:08:43,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:43,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:43,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:43,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:43,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1400781647, now seen corresponding path program 2 times [2022-07-22 21:08:43,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:43,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010382094] [2022-07-22 21:08:43,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:08:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:43,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:43,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 21:08:43,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:08:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:08:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:08:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:48,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010382094] [2022-07-22 21:08:48,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010382094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:48,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:48,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 21:08:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157660504] [2022-07-22 21:08:48,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:48,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:08:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:08:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:08:48,100 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:08:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:54,299 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-07-22 21:08:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:08:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-07-22 21:08:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:54,301 INFO L225 Difference]: With dead ends: 127 [2022-07-22 21:08:54,302 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 21:08:54,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 21:08:54,303 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 149 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:54,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 931 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 21:08:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 21:08:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2022-07-22 21:08:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2022-07-22 21:08:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-07-22 21:08:54,318 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 49 [2022-07-22 21:08:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:54,319 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-07-22 21:08:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:08:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-07-22 21:08:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 21:08:54,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:54,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:54,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:54,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:54,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1227181886, now seen corresponding path program 1 times [2022-07-22 21:08:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462266977] [2022-07-22 21:08:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:54,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:54,530 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 21:08:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:08:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:08:55,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:08:55,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462266977] [2022-07-22 21:08:55,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462266977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:55,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:55,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:08:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28004514] [2022-07-22 21:08:55,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:08:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:08:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:08:55,591 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:08:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:08:55,767 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-07-22 21:08:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:08:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-22 21:08:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:08:55,769 INFO L225 Difference]: With dead ends: 96 [2022-07-22 21:08:55,769 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 21:08:55,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:08:55,769 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:08:55,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 289 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-22 21:08:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 21:08:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-22 21:08:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-07-22 21:08:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-22 21:08:55,778 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 50 [2022-07-22 21:08:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:08:55,779 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-22 21:08:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:08:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2022-07-22 21:08:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:08:55,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:08:55,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:55,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:55,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:08:55,991 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:08:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash 792222103, now seen corresponding path program 1 times [2022-07-22 21:08:55,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:08:55,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730452935] [2022-07-22 21:08:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:55,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:08:55,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:08:55,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:08:55,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 21:08:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:08:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:56,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:08:58,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:08:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730452935] [2022-07-22 21:08:58,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730452935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:58,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:08:58,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-22 21:08:58,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423434988] [2022-07-22 21:08:58,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:58,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:08:58,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:08:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:08:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:08:58,671 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:09:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:01,277 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2022-07-22 21:09:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:09:01,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2022-07-22 21:09:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:01,279 INFO L225 Difference]: With dead ends: 130 [2022-07-22 21:09:01,279 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 21:09:01,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:09:01,280 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 78 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:01,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 739 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 21:09:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 21:09:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2022-07-22 21:09:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 77 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 21:09:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2022-07-22 21:09:01,304 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 51 [2022-07-22 21:09:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:01,305 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2022-07-22 21:09:01,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:09:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2022-07-22 21:09:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 21:09:01,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:01,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:01,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:01,516 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1615591569, now seen corresponding path program 1 times [2022-07-22 21:09:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:01,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770192665] [2022-07-22 21:09:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:01,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:01,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:01,518 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 21:09:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:09:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 21:09:02,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:09:02,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770192665] [2022-07-22 21:09:02,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770192665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:09:02,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:09:02,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:09:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088094621] [2022-07-22 21:09:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:09:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:09:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:09:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:09:02,233 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:09:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:03,119 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2022-07-22 21:09:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:09:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2022-07-22 21:09:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:03,121 INFO L225 Difference]: With dead ends: 160 [2022-07-22 21:09:03,121 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 21:09:03,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:09:03,122 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:03,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 509 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:09:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 21:09:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-07-22 21:09:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 71 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-22 21:09:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-07-22 21:09:03,132 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 55 [2022-07-22 21:09:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:03,132 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-07-22 21:09:03,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:09:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-07-22 21:09:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:09:03,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:03,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:03,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:03,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:03,344 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 381005423, now seen corresponding path program 1 times [2022-07-22 21:09:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:03,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311239151] [2022-07-22 21:09:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:03,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:03,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:03,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 21:09:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:09:03,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:09:06,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:09:06,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311239151] [2022-07-22 21:09:06,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311239151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:09:06,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:09:06,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:09:06,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512697096] [2022-07-22 21:09:06,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:09:06,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:09:06,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:09:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:09:06,485 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:09:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:06,633 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-07-22 21:09:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:09:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-07-22 21:09:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:06,634 INFO L225 Difference]: With dead ends: 95 [2022-07-22 21:09:06,634 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 21:09:06,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:09:06,635 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:06,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 367 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-22 21:09:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 21:09:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-22 21:09:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-22 21:09:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2022-07-22 21:09:06,642 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 51 [2022-07-22 21:09:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:06,643 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2022-07-22 21:09:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:09:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2022-07-22 21:09:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 21:09:06,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:06,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:06,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:06,854 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash 57968830, now seen corresponding path program 1 times [2022-07-22 21:09:06,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:06,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628917835] [2022-07-22 21:09:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:06,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:06,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:06,857 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:06,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 21:09:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:09:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:09:07,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:09:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:09:08,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:08,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628917835] [2022-07-22 21:09:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628917835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:09:08,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:09:08,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:09:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177273409] [2022-07-22 21:09:08,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:09:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:09:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:09:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:09:08,483 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:09:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:09,545 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2022-07-22 21:09:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:09:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-07-22 21:09:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:09,546 INFO L225 Difference]: With dead ends: 112 [2022-07-22 21:09:09,547 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 21:09:09,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:09:09,548 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:09,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 349 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:09:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 21:09:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-07-22 21:09:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2022-07-22 21:09:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2022-07-22 21:09:09,555 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 55 [2022-07-22 21:09:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:09,556 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2022-07-22 21:09:09,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:09:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2022-07-22 21:09:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 21:09:09,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:09,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:09,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-22 21:09:09,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:09,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -768011691, now seen corresponding path program 1 times [2022-07-22 21:09:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887315244] [2022-07-22 21:09:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:09,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:09,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:09,766 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:09,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 21:09:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:09:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:09:10,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:09:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:09:11,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887315244] [2022-07-22 21:09:11,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887315244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:09:11,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:09:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:09:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239013706] [2022-07-22 21:09:11,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:09:11,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:09:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:09:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:09:11,574 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:09:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:12,970 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2022-07-22 21:09:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:09:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-07-22 21:09:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:12,972 INFO L225 Difference]: With dead ends: 112 [2022-07-22 21:09:12,972 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 21:09:12,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:09:12,973 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 97 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:12,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 505 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 21:09:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 21:09:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-07-22 21:09:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2022-07-22 21:09:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-07-22 21:09:12,982 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 64 [2022-07-22 21:09:12,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-07-22 21:09:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:09:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-07-22 21:09:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 21:09:12,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:12,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:13,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:13,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:13,201 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -773215852, now seen corresponding path program 1 times [2022-07-22 21:09:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:13,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532564687] [2022-07-22 21:09:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:13,203 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:13,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 21:09:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:09:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates...