./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/filter1.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/float-benchs/filter1.c.v+lhb-reducer.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 27e2c506f8c4790ab21ed41c19bd1ea2839907b43d1ff7cacbbc276ad919ab4e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:06,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:06,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:06,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:06,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:06,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:06,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:06,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:06,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:06,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:06,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:06,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:06,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:06,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:06,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:06,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:06,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:06,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:06,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:06,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:06,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:06,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:06,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:06,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:06,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:06,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:06,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:06,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:06,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:06,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:06,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:06,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:06,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:06,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:06,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:06,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:06,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:06,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:06,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:06,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:06,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:06,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:48:06,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:06,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:06,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:06,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:06,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:06,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:06,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:06,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:06,760 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:06,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:06,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:06,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:06,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:06,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:06,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:48:06,768 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:06,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:06,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:06,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:06,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e2c506f8c4790ab21ed41c19bd1ea2839907b43d1ff7cacbbc276ad919ab4e [2021-12-21 11:48:06,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:06,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:06,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:06,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:06,974 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:06,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter1.c.v+lhb-reducer.c [2021-12-21 11:48:07,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afd4db47/b6c46c91aa1a4f9aabf7aab4dbe3b044/FLAG4ed1076e1 [2021-12-21 11:48:07,381 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:07,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter1.c.v+lhb-reducer.c [2021-12-21 11:48:07,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afd4db47/b6c46c91aa1a4f9aabf7aab4dbe3b044/FLAG4ed1076e1 [2021-12-21 11:48:07,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afd4db47/b6c46c91aa1a4f9aabf7aab4dbe3b044 [2021-12-21 11:48:07,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:07,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:07,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:07,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:07,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:07,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46473885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07, skipping insertion in model container [2021-12-21 11:48:07,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:07,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:07,579 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/float-benchs/filter1.c.v+lhb-reducer.c[1355,1368] [2021-12-21 11:48:07,585 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/float-benchs/filter1.c.v+lhb-reducer.c[2394,2407] [2021-12-21 11:48:07,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:07,593 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:07,603 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/float-benchs/filter1.c.v+lhb-reducer.c[1355,1368] [2021-12-21 11:48:07,606 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/float-benchs/filter1.c.v+lhb-reducer.c[2394,2407] [2021-12-21 11:48:07,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:07,618 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:07,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07 WrapperNode [2021-12-21 11:48:07,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:07,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:07,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:07,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:07,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,640 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 122 [2021-12-21 11:48:07,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:07,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:07,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:07,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:07,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:07,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:07,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:07,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:07,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (1/1) ... [2021-12-21 11:48:07,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:07,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:48:07,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:48:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:48:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:07,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:07,747 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:07,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:07,847 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:07,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:07,851 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:48:07,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:07 BoogieIcfgContainer [2021-12-21 11:48:07,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:07,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:07,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:07,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:07,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:07" (1/3) ... [2021-12-21 11:48:07,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950df21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:07, skipping insertion in model container [2021-12-21 11:48:07,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:07" (2/3) ... [2021-12-21 11:48:07,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950df21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:07, skipping insertion in model container [2021-12-21 11:48:07,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:07" (3/3) ... [2021-12-21 11:48:07,858 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c.v+lhb-reducer.c [2021-12-21 11:48:07,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:07,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 11:48:07,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:07,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:48:07,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 11:48:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 30 states have (on average 1.6) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:48:07,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:07,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:07,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash 775758574, now seen corresponding path program 1 times [2021-12-21 11:48:07,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:07,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411657773] [2021-12-21 11:48:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:07,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:08,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:48:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411657773] [2021-12-21 11:48:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411657773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:08,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:08,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:48:08,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857689052] [2021-12-21 11:48:08,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:48:08,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:48:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:48:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:48:08,159 INFO L87 Difference]: Start difference. First operand has 33 states, 30 states have (on average 1.6) internal successors, (48), 32 states have internal predecessors, (48), 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) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:08,227 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2021-12-21 11:48:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:48:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 11:48:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:08,235 INFO L225 Difference]: With dead ends: 45 [2021-12-21 11:48:08,236 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 11:48:08,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:48:08,244 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 44 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:08,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 11:48:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-21 11:48:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-21 11:48:08,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2021-12-21 11:48:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:08,276 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-21 11:48:08,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-21 11:48:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:48:08,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:08,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:08,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:48:08,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash 843294771, now seen corresponding path program 1 times [2021-12-21 11:48:08,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:08,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008170112] [2021-12-21 11:48:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:08,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:08,298 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:48:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:08,324 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:48:08,325 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:48:08,326 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-21 11:48:08,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-21 11:48:08,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:48:08,330 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 11:48:08,331 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:48:08,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:48:08 BoogieIcfgContainer [2021-12-21 11:48:08,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:48:08,349 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:48:08,349 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:48:08,349 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:48:08,349 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:07" (3/4) ... [2021-12-21 11:48:08,351 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:48:08,352 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:48:08,353 INFO L158 Benchmark]: Toolchain (without parser) took 940.55ms. Allocated memory is still 104.9MB. Free memory was 84.9MB in the beginning and 80.0MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-21 11:48:08,354 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:08,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.67ms. Allocated memory is still 104.9MB. Free memory was 84.5MB in the beginning and 74.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 11:48:08,355 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.70ms. Allocated memory is still 104.9MB. Free memory was 74.7MB in the beginning and 73.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:08,356 INFO L158 Benchmark]: Boogie Preprocessor took 12.64ms. Allocated memory is still 104.9MB. Free memory was 73.1MB in the beginning and 72.1MB in the end (delta: 955.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:08,356 INFO L158 Benchmark]: RCFGBuilder took 198.48ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 60.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 11:48:08,357 INFO L158 Benchmark]: TraceAbstraction took 494.52ms. Allocated memory is still 104.9MB. Free memory was 60.5MB in the beginning and 80.0MB in the end (delta: -19.5MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2021-12-21 11:48:08,359 INFO L158 Benchmark]: Witness Printer took 3.64ms. Allocated memory is still 104.9MB. Free memory is still 80.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:08,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.67ms. Allocated memory is still 104.9MB. Free memory was 84.5MB in the beginning and 74.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.70ms. Allocated memory is still 104.9MB. Free memory was 74.7MB in the beginning and 73.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.64ms. Allocated memory is still 104.9MB. Free memory was 73.1MB in the beginning and 72.1MB in the end (delta: 955.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 198.48ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 60.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 494.52ms. Allocated memory is still 104.9MB. Free memory was 60.5MB in the beginning and 80.0MB in the end (delta: -19.5MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Witness Printer took 3.64ms. Allocated memory is still 104.9MB. Free memory is still 80.0MB. 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: 58]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 45, overapproximation of to_real at line 41. Possible FailurePath: [L1] int __return_main; [L13] int __tmp_129_0; [L14] int __tmp_129_1; [L15] int __tmp_129_2; [L16] int __return_134; VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0] [L19] double main__E0; [L20] double main__E1; [L21] double main__S; [L22] int main__i; [L23] main__E1 = 0 [L24] main__S = 0 [L25] main__i = 0 VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main__i=0] [L26] COND TRUE main__i <= 1000000 [L28] main__E0 = __VERIFIER_nondet_double() [L29] int main____CPAchecker_TMP_0; VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main__E0=49, main__i=0] [L30] COND TRUE main__E0 >= -1.0 VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main__E0=49, main__i=0] [L32] COND TRUE main__E0 <= 1.0 [L34] main____CPAchecker_TMP_0 = 1 VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main____CPAchecker_TMP_0=1, main__E0=49, main__i=0] [L35] COND TRUE main____CPAchecker_TMP_0 != 0 [L37] int main____CPAchecker_TMP_1; [L38] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L39] COND TRUE !(main____CPAchecker_TMP_1 == 0) [L41] main__S = 0 VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__E0=49, main__i=0] [L43] main__E1 = main__E0 [L44] int main____CPAchecker_TMP_2; VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__E0=49, main__E1=49, main__i=0] [L45] COND FALSE !(main__S >= -10000.0) VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main__E0=49, main__E1=49, main__i=0] [L162] main____CPAchecker_TMP_2 = 0 VAL [__return_134=0, __return_main=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__E0=49, main__E1=49, main__i=0] [L52] int __tmp_1; [L53] __tmp_1 = main____CPAchecker_TMP_2 [L54] int __VERIFIER_assert__cond; [L55] __VERIFIER_assert__cond = __tmp_1 VAL [__return_134=0, __return_main=0, __tmp_1=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__E0=49, main__E1=49, main__i=0] [L56] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_134=0, __return_main=0, __tmp_1=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__E0=49, main__E1=49, main__i=0] [L58] reach_error() VAL [__return_134=0, __return_main=0, __tmp_1=0, __tmp_129_0=0, __tmp_129_1=0, __tmp_129_2=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=1, main____CPAchecker_TMP_2=0, main__E0=49, main__E1=49, main__i=0] - UnprovableResult [Line: 104]: 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 1 procedures, 33 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 131 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 87 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17 IncrementalHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 44 mSDtfsCounter, 17 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 20 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 [2021-12-21 11:48:08,398 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/float-benchs/filter1.c.v+lhb-reducer.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 27e2c506f8c4790ab21ed41c19bd1ea2839907b43d1ff7cacbbc276ad919ab4e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:09,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:09,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:10,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:10,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:10,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:10,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:10,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:10,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:10,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:10,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:10,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:10,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:10,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:10,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:10,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:10,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:10,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:10,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:10,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:10,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:10,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:10,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:10,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:10,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:10,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:10,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:10,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:10,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:10,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:10,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:10,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:10,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:10,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:10,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:10,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:10,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:10,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:10,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:10,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:10,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:10,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:48:10,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:10,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:10,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:10,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:10,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:10,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:10,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:10,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:10,081 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:10,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:10,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:10,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:10,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:48:10,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:10,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:10,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:10,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:10,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:10,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:10,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:10,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:10,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:10,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:10,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:10,091 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:48:10,091 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:48:10,092 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:10,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:10,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:10,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:10,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:48:10,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e2c506f8c4790ab21ed41c19bd1ea2839907b43d1ff7cacbbc276ad919ab4e [2021-12-21 11:48:10,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:10,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:10,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:10,369 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:10,371 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:10,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter1.c.v+lhb-reducer.c [2021-12-21 11:48:10,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62ba2a32/068d08e3858c497b89f568998cef9037/FLAG336a15408 [2021-12-21 11:48:10,743 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:10,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter1.c.v+lhb-reducer.c [2021-12-21 11:48:10,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62ba2a32/068d08e3858c497b89f568998cef9037/FLAG336a15408 [2021-12-21 11:48:11,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62ba2a32/068d08e3858c497b89f568998cef9037 [2021-12-21 11:48:11,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:11,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:11,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:11,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:11,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:11,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fb1a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11, skipping insertion in model container [2021-12-21 11:48:11,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:11,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:11,306 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/float-benchs/filter1.c.v+lhb-reducer.c[1355,1368] [2021-12-21 11:48:11,316 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/float-benchs/filter1.c.v+lhb-reducer.c[2394,2407] [2021-12-21 11:48:11,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:11,336 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:11,380 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/float-benchs/filter1.c.v+lhb-reducer.c[1355,1368] [2021-12-21 11:48:11,391 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/float-benchs/filter1.c.v+lhb-reducer.c[2394,2407] [2021-12-21 11:48:11,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:11,405 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:11,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11 WrapperNode [2021-12-21 11:48:11,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:11,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:11,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:11,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:11,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,429 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 121 [2021-12-21 11:48:11,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:11,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:11,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:11,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:11,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:11,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:11,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:11,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:11,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (1/1) ... [2021-12-21 11:48:11,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:11,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:11,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:48:11,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:48:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:48:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:11,552 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:11,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:15,865 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:15,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:15,871 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:48:15,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:15 BoogieIcfgContainer [2021-12-21 11:48:15,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:15,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:15,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:15,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:15,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:11" (1/3) ... [2021-12-21 11:48:15,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a77dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:15, skipping insertion in model container [2021-12-21 11:48:15,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:11" (2/3) ... [2021-12-21 11:48:15,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a77dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:15, skipping insertion in model container [2021-12-21 11:48:15,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:15" (3/3) ... [2021-12-21 11:48:15,878 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c.v+lhb-reducer.c [2021-12-21 11:48:15,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:15,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 11:48:15,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:15,924 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:48:15,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 11:48:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 30 states have (on average 1.6) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:48:15,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:15,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:15,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash 775758574, now seen corresponding path program 1 times [2021-12-21 11:48:15,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:15,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956721996] [2021-12-21 11:48:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:15,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:15,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:15,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 11:48:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:48:16,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:16,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:16,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956721996] [2021-12-21 11:48:16,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956721996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:16,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:16,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:48:16,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791163025] [2021-12-21 11:48:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:48:16,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:48:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:48:16,193 INFO L87 Difference]: Start difference. First operand has 33 states, 30 states have (on average 1.6) internal successors, (48), 32 states have internal predecessors, (48), 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) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:16,303 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-12-21 11:48:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:48:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 11:48:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:16,313 INFO L225 Difference]: With dead ends: 59 [2021-12-21 11:48:16,314 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 11:48:16,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:48:16,321 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 28 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:16,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 11:48:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 11:48:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2021-12-21 11:48:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-21 11:48:16,350 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2021-12-21 11:48:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:16,350 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-21 11:48:16,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-21 11:48:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:48:16,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:16,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:16,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 11:48:16,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:16,560 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 843294771, now seen corresponding path program 1 times [2021-12-21 11:48:16,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001599200] [2021-12-21 11:48:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:16,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:16,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:16,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:16,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 11:48:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:48:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:16,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:16,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001599200] [2021-12-21 11:48:16,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001599200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:16,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:16,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:48:16,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47301971] [2021-12-21 11:48:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:16,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:48:16,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:48:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:48:16,696 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:18,033 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-12-21 11:48:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:48:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 11:48:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:18,034 INFO L225 Difference]: With dead ends: 71 [2021-12-21 11:48:18,034 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 11:48:18,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:48:18,035 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:18,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:48:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 11:48:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-12-21 11:48:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-12-21 11:48:18,040 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 13 [2021-12-21 11:48:18,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:18,040 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-12-21 11:48:18,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-12-21 11:48:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:48:18,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:18,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:18,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:18,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:18,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1349105153, now seen corresponding path program 1 times [2021-12-21 11:48:18,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884708615] [2021-12-21 11:48:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:18,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:18,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:18,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 11:48:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:48:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:19,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:19,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884708615] [2021-12-21 11:48:19,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884708615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:19,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:19,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:48:19,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084797526] [2021-12-21 11:48:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:19,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:48:19,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:48:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:48:19,167 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:22,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:48:24,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:48:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:24,219 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-12-21 11:48:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:48:24,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 11:48:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:24,222 INFO L225 Difference]: With dead ends: 61 [2021-12-21 11:48:24,222 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 11:48:24,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:48:24,223 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:24,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 2 Unknown, 15 Unchecked, 5.0s Time] [2021-12-21 11:48:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 11:48:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-21 11:48:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-12-21 11:48:24,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 13 [2021-12-21 11:48:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:24,227 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-12-21 11:48:24,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-12-21 11:48:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 11:48:24,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:24,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:24,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:24,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:24,432 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1134941057, now seen corresponding path program 1 times [2021-12-21 11:48:24,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:24,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517552034] [2021-12-21 11:48:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:24,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:24,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:24,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 11:48:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 11:48:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:25,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:25,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517552034] [2021-12-21 11:48:25,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517552034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:25,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:25,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:48:25,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093231289] [2021-12-21 11:48:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:25,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:48:25,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:25,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:48:25,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:48:25,396 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:25,987 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-21 11:48:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:48:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 11:48:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:26,039 INFO L225 Difference]: With dead ends: 56 [2021-12-21 11:48:26,039 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 11:48:26,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:48:26,041 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:26,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 20 Unchecked, 0.6s Time] [2021-12-21 11:48:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 11:48:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-21 11:48:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-21 11:48:26,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-12-21 11:48:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:26,046 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-21 11:48:26,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-21 11:48:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:48:26,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:26,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:26,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:26,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:26,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -151896705, now seen corresponding path program 1 times [2021-12-21 11:48:26,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802430525] [2021-12-21 11:48:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:26,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:26,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:26,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 11:48:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:48:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:26,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:26,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802430525] [2021-12-21 11:48:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802430525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:26,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:26,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:48:26,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782469163] [2021-12-21 11:48:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:26,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:48:26,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:48:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:48:26,361 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:26,382 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-21 11:48:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:48:26,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 11:48:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:26,383 INFO L225 Difference]: With dead ends: 49 [2021-12-21 11:48:26,383 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 11:48:26,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:48:26,384 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:26,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 11:48:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 11:48:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-21 11:48:26,388 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-12-21 11:48:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:26,388 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-21 11:48:26,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-21 11:48:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:48:26,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:26,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:26,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:26,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:26,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash -327957724, now seen corresponding path program 1 times [2021-12-21 11:48:26,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:26,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320131544] [2021-12-21 11:48:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:26,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:26,592 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) [2021-12-21 11:48:26,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 11:48:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:48:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:26,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:26,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320131544] [2021-12-21 11:48:26,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320131544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:26,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:26,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:48:26,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618336472] [2021-12-21 11:48:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:48:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:48:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:48:26,699 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:26,800 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-12-21 11:48:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:48:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 11:48:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:26,801 INFO L225 Difference]: With dead ends: 48 [2021-12-21 11:48:26,801 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 11:48:26,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:48:26,802 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:26,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 94 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 11:48:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 11:48:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-12-21 11:48:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-21 11:48:26,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2021-12-21 11:48:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:26,807 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-21 11:48:26,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-21 11:48:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:48:26,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:26,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:26,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:27,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:27,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash 401808482, now seen corresponding path program 1 times [2021-12-21 11:48:27,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011464914] [2021-12-21 11:48:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:27,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:27,013 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) [2021-12-21 11:48:27,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 11:48:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 11:48:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:48:43,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:43,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011464914] [2021-12-21 11:48:43,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011464914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:43,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:43,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 11:48:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292662491] [2021-12-21 11:48:43,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:43,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 11:48:43,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 11:48:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=49, Unknown=3, NotChecked=0, Total=90 [2021-12-21 11:48:43,466 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:45,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:48:53,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:48:55,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:48:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:56,034 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-12-21 11:48:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 11:48:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 11:48:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:56,035 INFO L225 Difference]: With dead ends: 68 [2021-12-21 11:48:56,035 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 11:48:56,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=46, Invalid=61, Unknown=3, NotChecked=0, Total=110 [2021-12-21 11:48:56,036 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:56,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 3 Unknown, 10 Unchecked, 8.1s Time] [2021-12-21 11:48:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 11:48:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-21 11:48:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-21 11:48:56,045 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2021-12-21 11:48:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:56,045 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-21 11:48:56,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:48:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-21 11:48:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:48:56,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:56,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:56,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:56,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:56,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -60423724, now seen corresponding path program 1 times [2021-12-21 11:48:56,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938759925] [2021-12-21 11:48:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:56,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:56,261 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) [2021-12-21 11:48:56,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 11:48:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:57,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 11:48:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates...