./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/filter_iir.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/filter_iir.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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:43,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:43,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:43,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:43,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:43,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:43,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:43,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:43,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:43,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:43,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:43,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:43,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:43,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:43,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:43,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:43,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:43,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:43,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:43,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:43,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:43,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:43,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:43,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:43,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:43,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:43,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:43,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:43,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:43,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:43,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:43,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:43,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:43,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:43,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:43,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:43,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:43,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:43,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:43,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:43,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:43,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:48:43,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:43,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:43,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:43,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:43,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:43,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:43,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:43,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:43,526 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:43,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:43,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:43,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:48:43,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:43,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:43,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:43,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:43,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:43,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:43,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:43,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:43,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:43,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:43,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:43,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:43,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:43,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:43,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:43,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:43,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:48:43,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:48:43,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:43,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:43,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:43,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:43,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-12-21 11:48:43,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:43,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:43,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:43,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:43,715 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:43,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter_iir.c [2021-12-21 11:48:43,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202d6910d/aac634b1d99443d9af8bed201d162eed/FLAG55b0b5b9a [2021-12-21 11:48:44,148 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:44,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c [2021-12-21 11:48:44,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202d6910d/aac634b1d99443d9af8bed201d162eed/FLAG55b0b5b9a [2021-12-21 11:48:44,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202d6910d/aac634b1d99443d9af8bed201d162eed [2021-12-21 11:48:44,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:44,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:44,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:44,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:44,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:44,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513c924b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44, skipping insertion in model container [2021-12-21 11:48:44,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:44,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:44,348 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/filter_iir.c[583,596] [2021-12-21 11:48:44,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:44,380 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:44,387 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/filter_iir.c[583,596] [2021-12-21 11:48:44,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:44,406 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:44,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44 WrapperNode [2021-12-21 11:48:44,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:44,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:44,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:44,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:44,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,432 INFO L137 Inliner]: procedures = 18, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 140 [2021-12-21 11:48:44,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:44,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:44,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:44,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:44,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:44,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:44,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:44,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:44,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (1/1) ... [2021-12-21 11:48:44,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:44,488 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 11:48:44,523 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 11:48:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:48:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-12-21 11:48:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-12-21 11:48:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-12-21 11:48:44,577 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:44,578 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:44,698 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:44,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:44,702 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:48:44,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:44 BoogieIcfgContainer [2021-12-21 11:48:44,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:44,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:44,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:44,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:44,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:44" (1/3) ... [2021-12-21 11:48:44,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ed22c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:44, skipping insertion in model container [2021-12-21 11:48:44,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:44" (2/3) ... [2021-12-21 11:48:44,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ed22c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:44, skipping insertion in model container [2021-12-21 11:48:44,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:44" (3/3) ... [2021-12-21 11:48:44,709 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-12-21 11:48:44,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:44,712 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:48:44,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:44,745 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 11:48:44,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:48:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 11:48:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:48:44,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:44,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:44,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2021-12-21 11:48:44,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:44,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069380901] [2021-12-21 11:48:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:44,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:44,973 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 11:48:44,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:48:44,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069380901] [2021-12-21 11:48:44,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069380901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:44,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:44,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:48:44,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144444507] [2021-12-21 11:48:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 11:48:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:48:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 11:48:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:45,037 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 11:48:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:45,046 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-12-21 11:48:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 11:48:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:48:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:45,054 INFO L225 Difference]: With dead ends: 30 [2021-12-21 11:48:45,054 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 11:48:45,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:45,060 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:45,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 11:48:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 11:48:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 11:48:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 11:48:45,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-12-21 11:48:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:45,086 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 11:48:45,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 11:48:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 11:48:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:48:45,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:45,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:48:45,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2021-12-21 11:48:45,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:45,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864503311] [2021-12-21 11:48:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:45,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:45,262 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 11:48:45,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:48:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864503311] [2021-12-21 11:48:45,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864503311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:45,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:45,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:48:45,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271588303] [2021-12-21 11:48:45,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:45,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:48:45,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:48:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:48:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:48:45,265 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 11:48:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:45,287 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-12-21 11:48:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:48:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:48:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:45,288 INFO L225 Difference]: With dead ends: 28 [2021-12-21 11:48:45,288 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 11:48:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:48:45,290 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 11:48:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 11:48:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 11:48:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-21 11:48:45,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-12-21 11:48:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:45,294 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-21 11:48:45,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 11:48:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-21 11:48:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:48:45,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:45,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:45,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:48:45,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2021-12-21 11:48:45,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058281607] [2021-12-21 11:48:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:45,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:45,371 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:48:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:45,419 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:48:45,420 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:48:45,420 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 11:48:45,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:48:45,424 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-21 11:48:45,430 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:48:45,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:48:45 BoogieIcfgContainer [2021-12-21 11:48:45,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:48:45,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:48:45,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:48:45,471 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:48:45,471 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:44" (3/4) ... [2021-12-21 11:48:45,477 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:48:45,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:48:45,478 INFO L158 Benchmark]: Toolchain (without parser) took 1304.67ms. Allocated memory is still 96.5MB. Free memory was 62.6MB in the beginning and 61.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2021-12-21 11:48:45,482 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 58.2MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:45,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.34ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 71.6MB in the end (delta: -9.1MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2021-12-21 11:48:45,483 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.15ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 69.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:48:45,484 INFO L158 Benchmark]: Boogie Preprocessor took 17.64ms. Allocated memory is still 96.5MB. Free memory was 69.6MB in the beginning and 68.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:48:45,484 INFO L158 Benchmark]: RCFGBuilder took 252.75ms. Allocated memory is still 96.5MB. Free memory was 68.1MB in the beginning and 53.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-21 11:48:45,484 INFO L158 Benchmark]: TraceAbstraction took 765.81ms. Allocated memory is still 96.5MB. Free memory was 52.8MB in the beginning and 61.5MB in the end (delta: -8.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:45,484 INFO L158 Benchmark]: Witness Printer took 6.43ms. Allocated memory is still 96.5MB. Free memory is still 61.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:45,486 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 79.7MB. Free memory was 58.3MB in the beginning and 58.2MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.34ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 71.6MB in the end (delta: -9.1MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.15ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 69.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.64ms. Allocated memory is still 96.5MB. Free memory was 69.6MB in the beginning and 68.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 252.75ms. Allocated memory is still 96.5MB. Free memory was 68.1MB in the beginning and 53.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 765.81ms. Allocated memory is still 96.5MB. Free memory was 52.8MB in the beginning and 61.5MB in the end (delta: -8.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.43ms. Allocated memory is still 96.5MB. Free memory is still 61.5MB. 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: 13]: 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 54, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; VAL [A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. VAL [A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. VAL [\read(X)=63, \read(X)=63, A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L11] COND FALSE !(!cond) VAL [\old(cond)=1, A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, cond=1, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) [L52] CALL iir4(&X, &P) [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 VAL [A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, D1={8:0}, D2={9:0}, P={10:0}, t1=51, t2=58, x={11:0}, x={11:0}, X={11:0}, y={10:0}, y={10:0}] [L52] RET iir4(&X, &P) [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 VAL [\read(P)=59, A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, D1={8:0}, D2={9:0}, P={10:0}, P >= -1e30 && P <= 1e30=0, X={11:0}] [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) VAL [\old(cond)=0, A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, cond=0, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] [L13] reach_error() VAL [\old(cond)=0, A1={4:0}, A2={6:0}, b1={5:0}, b2={7:0}, cond=0, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 3, 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, 1 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 55 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 31 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 11:48:45,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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/filter_iir.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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:47,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:47,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:47,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:47,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:47,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:47,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:47,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:47,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:47,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:47,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:47,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:47,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:47,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:47,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:47,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:47,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:47,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:47,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:47,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:47,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:47,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:47,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:47,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:47,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:47,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:47,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:47,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:47,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:47,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:47,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:47,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:47,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:47,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:47,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:47,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:47,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:47,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:47,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:47,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:47,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:47,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:48:47,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:47,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:47,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:47,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:47,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:47,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:47,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:47,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:47,298 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:47,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:47,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:47,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:47,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:48:47,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:47,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:47,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:47,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:47,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:47,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:47,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:47,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:48:47,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-12-21 11:48:47,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:47,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:47,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:47,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:47,547 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:47,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter_iir.c [2021-12-21 11:48:47,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddda6d3ab/659b014bdec947a28c1647560cc05b83/FLAG0e999cf87 [2021-12-21 11:48:47,986 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:47,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c [2021-12-21 11:48:47,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddda6d3ab/659b014bdec947a28c1647560cc05b83/FLAG0e999cf87 [2021-12-21 11:48:48,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddda6d3ab/659b014bdec947a28c1647560cc05b83 [2021-12-21 11:48:48,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:48,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:48,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:48,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:48,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:48,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec1f834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48, skipping insertion in model container [2021-12-21 11:48:48,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:48,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:48,529 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/filter_iir.c[583,596] [2021-12-21 11:48:48,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:48,619 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:48,627 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/filter_iir.c[583,596] [2021-12-21 11:48:48,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:48,650 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:48,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48 WrapperNode [2021-12-21 11:48:48,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:48,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:48,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:48,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:48,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,686 INFO L137 Inliner]: procedures = 19, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 141 [2021-12-21 11:48:48,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:48,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:48,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:48,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:48,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:48,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:48,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:48,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:48,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (1/1) ... [2021-12-21 11:48:48,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:48,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:48,731 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 11:48:48,746 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 11:48:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-12-21 11:48:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-12-21 11:48:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:48:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2021-12-21 11:48:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:48,838 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:48,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:51,607 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:51,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:51,613 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:48:51,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:51 BoogieIcfgContainer [2021-12-21 11:48:51,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:51,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:51,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:51,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:48" (1/3) ... [2021-12-21 11:48:51,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d71b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:51, skipping insertion in model container [2021-12-21 11:48:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:48" (2/3) ... [2021-12-21 11:48:51,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d71b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:51, skipping insertion in model container [2021-12-21 11:48:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:51" (3/3) ... [2021-12-21 11:48:51,620 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-12-21 11:48:51,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:51,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:48:51,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:51,722 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 11:48:51,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:48:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 11:48:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:48:51,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:51,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:51,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2021-12-21 11:48:51,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066408168] [2021-12-21 11:48:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:51,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:51,786 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 11:48:51,789 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 11:48:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 11:48:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:54,427 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 11:48:54,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:54,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066408168] [2021-12-21 11:48:54,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066408168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:54,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:54,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:48:54,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930167896] [2021-12-21 11:48:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:54,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 11:48:54,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 11:48:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:54,474 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 11:48:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:54,483 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-12-21 11:48:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 11:48:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:48:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:54,494 INFO L225 Difference]: With dead ends: 30 [2021-12-21 11:48:54,494 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 11:48:54,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:54,499 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:54,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 11:48:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 11:48:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 11:48:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 11:48:54,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-12-21 11:48:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 11:48:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 11:48:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 11:48:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:48:54,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:54,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:54,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:54,743 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 11:48:54,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2021-12-21 11:48:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999413413] [2021-12-21 11:48:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:54,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:54,747 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 11:48:54,760 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 11:48:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:57,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:48:57,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:57,610 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 11:48:57,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:57,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999413413] [2021-12-21 11:48:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999413413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:57,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:57,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:48:57,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568364957] [2021-12-21 11:48:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:48:57,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:48:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:48:57,613 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 11:49:00,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 11:49:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:49:00,869 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-12-21 11:49:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:49:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:49:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:49:01,300 INFO L225 Difference]: With dead ends: 28 [2021-12-21 11:49:01,300 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 11:49:01,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:49:01,301 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:49:01,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:49:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 11:49:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 11:49:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 11:49:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-21 11:49:01,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-12-21 11:49:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:49:01,303 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-21 11:49:01,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 11:49:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-21 11:49:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:49:01,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:01,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:01,385 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 11:49:01,515 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 11:49:01,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2021-12-21 11:49:01,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:49:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646054090] [2021-12-21 11:49:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:01,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:49:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:49:01,532 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 11:49:01,533 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 11:49:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:26,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-21 11:49:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:49:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 11:49:29,758 INFO L244 Elim1Store]: Index analysis took 125 ms [2021-12-21 11:49:30,561 INFO L353 Elim1Store]: treesize reduction 459, result has 5.9 percent of original size [2021-12-21 11:49:30,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 21 disjoint index pairs (out of 120 index pairs), introduced 17 new quantified variables, introduced 29 case distinctions, treesize of input 244 treesize of output 287 [2021-12-21 11:49:30,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 220 [2021-12-21 11:49:34,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 220 [2021-12-21 11:49:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:49:51,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 1218 treesize of output 944 [2021-12-21 11:49:51,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 813 treesize of output 757 [2021-12-21 11:49:52,246 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-21 11:49:52,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 795 treesize of output 697 [2021-12-21 11:49:58,755 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (bvadd |~#P~0.offset| (_ bv4 32)) (_ bv0 32)) [2021-12-21 11:49:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 11:50:00,759 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= ((_ extract 31 0) v_skolemized_v_prenex_23_6) ((_ extract 63 32) v_skolemized_v_prenex_23_6))