./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:26:48,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:26:48,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:26:48,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:26:48,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:26:48,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:26:48,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:26:48,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:26:48,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:26:48,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:26:48,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:26:48,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:26:48,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:26:48,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:26:48,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:26:48,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:26:48,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:26:48,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:26:48,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:26:48,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:26:48,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:26:48,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:26:48,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:26:48,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:26:48,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:26:48,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:26:48,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:26:48,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:26:48,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:26:48,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:26:48,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:26:48,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:26:48,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:26:48,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:26:48,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:26:48,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:26:48,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:26:48,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:26:48,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:26:48,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:26:48,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:26:48,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:26:48,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:26:48,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:26:48,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:26:48,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:26:48,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:26:48,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:26:48,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:26:48,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:26:48,417 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:26:48,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:26:48,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:26:48,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:26:48,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:26:48,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:26:48,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:26:48,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:26:48,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:26:48,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:26:48,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-12-15 23:26:48,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:26:48,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:26:48,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:26:48,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:26:48,669 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:26:48,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:48,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29baa810e/7b1f8a0ec03f4732858327e6d030904d/FLAG124eea117 [2021-12-15 23:26:49,134 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:26:49,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:49,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29baa810e/7b1f8a0ec03f4732858327e6d030904d/FLAG124eea117 [2021-12-15 23:26:49,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29baa810e/7b1f8a0ec03f4732858327e6d030904d [2021-12-15 23:26:49,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:26:49,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:26:49,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:26:49,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:26:49,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:26:49,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d97d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49, skipping insertion in model container [2021-12-15 23:26:49,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:26:49,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:26:49,287 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/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-12-15 23:26:49,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:26:49,296 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:26:49,305 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/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-12-15 23:26:49,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:26:49,315 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:26:49,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49 WrapperNode [2021-12-15 23:26:49,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:26:49,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:26:49,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:26:49,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:26:49,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,353 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-12-15 23:26:49,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:26:49,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:26:49,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:26:49,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:26:49,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:26:49,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:26:49,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:26:49,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:26:49,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (1/1) ... [2021-12-15 23:26:49,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:26:49,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:26:49,409 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) [2021-12-15 23:26:49,415 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 [2021-12-15 23:26:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:26:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:26:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:26:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:26:49,483 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:26:49,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:26:49,571 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:26:49,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:26:49,576 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 23:26:49,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:26:49 BoogieIcfgContainer [2021-12-15 23:26:49,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:26:49,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:26:49,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:26:49,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:26:49,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:26:49" (1/3) ... [2021-12-15 23:26:49,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e24c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:26:49, skipping insertion in model container [2021-12-15 23:26:49,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:49" (2/3) ... [2021-12-15 23:26:49,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e24c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:26:49, skipping insertion in model container [2021-12-15 23:26:49,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:26:49" (3/3) ... [2021-12-15 23:26:49,586 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:49,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:26:49,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:26:49,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:26:49,637 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 [2021-12-15 23:26:49,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:26:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-15 23:26:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 23:26:49,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:49,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 23:26:49,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-15 23:26:49,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:26:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670268738] [2021-12-15 23:26:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:49,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:26:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:49,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:26:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670268738] [2021-12-15 23:26:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670268738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:26:49,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:26:49,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:26:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578096091] [2021-12-15 23:26:49,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:26:49,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:26:49,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:26:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:26:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:26:49,920 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 23:26:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:49,934 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-15 23:26:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:26:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-12-15 23:26:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:49,941 INFO L225 Difference]: With dead ends: 16 [2021-12-15 23:26:49,942 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 23:26:49,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:26:49,950 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:49,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:26:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 23:26:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 23:26:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:26:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-12-15 23:26:49,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-12-15 23:26:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:49,976 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-12-15 23:26:49,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 23:26:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-12-15 23:26:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:26:49,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:49,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:26:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:26:49,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2021-12-15 23:26:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:26:49,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014529447] [2021-12-15 23:26:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:49,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:26:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:26:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014529447] [2021-12-15 23:26:50,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014529447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:26:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562689758] [2021-12-15 23:26:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:50,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:26:50,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:26:50,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:26:50,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:26:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 23:26:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:26:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:26:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562689758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:26:50,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:26:50,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 23:26:50,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740397186] [2021-12-15 23:26:50,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:26:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 23:26:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:26:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 23:26:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:26:50,147 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-15 23:26:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:50,163 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-12-15 23:26:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:26:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 6 [2021-12-15 23:26:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:50,165 INFO L225 Difference]: With dead ends: 13 [2021-12-15 23:26:50,165 INFO L226 Difference]: Without dead ends: 10 [2021-12-15 23:26:50,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:26:50,169 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:50,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:26:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-15 23:26:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-15 23:26:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-12-15 23:26:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-15 23:26:50,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2021-12-15 23:26:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:50,173 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-15 23:26:50,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-15 23:26:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-15 23:26:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 23:26:50,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:50,178 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-12-15 23:26:50,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 23:26:50,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:26:50,394 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 2 times [2021-12-15 23:26:50,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:26:50,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882555808] [2021-12-15 23:26:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:50,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:26:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:26:50,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882555808] [2021-12-15 23:26:50,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882555808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:26:50,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619555590] [2021-12-15 23:26:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:26:50,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:26:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:26:50,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:26:50,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:26:50,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:26:50,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:26:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:26:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:26:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:26:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:50,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619555590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:26:50,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:26:50,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 23:26:50,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986975870] [2021-12-15 23:26:50,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:26:50,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 23:26:50,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:26:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 23:26:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 23:26:50,609 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-12-15 23:26:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:50,626 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-12-15 23:26:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 23:26:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 9 [2021-12-15 23:26:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:50,628 INFO L225 Difference]: With dead ends: 19 [2021-12-15 23:26:50,628 INFO L226 Difference]: Without dead ends: 16 [2021-12-15 23:26:50,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 23:26:50,629 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:50,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:26:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-15 23:26:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-15 23:26:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-12-15 23:26:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-12-15 23:26:50,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2021-12-15 23:26:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:50,634 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-12-15 23:26:50,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-12-15 23:26:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-12-15 23:26:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 23:26:50,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:50,635 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-12-15 23:26:50,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:26:50,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-15 23:26:50,852 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:50,852 INFO L85 PathProgramCache]: Analyzing trace with hash -763767610, now seen corresponding path program 3 times [2021-12-15 23:26:50,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:26:50,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680861964] [2021-12-15 23:26:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:50,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:26:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:26:50,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 23:26:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:26:50,919 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 23:26:50,919 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 23:26:50,920 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 23:26:50,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:26:50,924 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-12-15 23:26:50,927 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 23:26:50,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:26:50 BoogieIcfgContainer [2021-12-15 23:26:50,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 23:26:50,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 23:26:50,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 23:26:50,948 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 23:26:50,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:26:49" (3/4) ... [2021-12-15 23:26:50,951 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 23:26:50,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 23:26:50,952 INFO L158 Benchmark]: Toolchain (without parser) took 1790.32ms. Allocated memory is still 98.6MB. Free memory was 60.7MB in the beginning and 34.2MB in the end (delta: 26.5MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2021-12-15 23:26:50,952 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:26:50,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.72ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 50.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 23:26:50,953 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.37ms. Allocated memory is still 98.6MB. Free memory was 50.9MB in the beginning and 78.5MB in the end (delta: -27.6MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-12-15 23:26:50,953 INFO L158 Benchmark]: Boogie Preprocessor took 19.28ms. Allocated memory is still 98.6MB. Free memory was 78.5MB in the beginning and 77.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:26:50,953 INFO L158 Benchmark]: RCFGBuilder took 202.95ms. Allocated memory is still 98.6MB. Free memory was 77.5MB in the beginning and 67.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 23:26:50,954 INFO L158 Benchmark]: TraceAbstraction took 1367.45ms. Allocated memory is still 98.6MB. Free memory was 67.5MB in the beginning and 34.5MB in the end (delta: 33.0MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2021-12-15 23:26:50,954 INFO L158 Benchmark]: Witness Printer took 3.28ms. Allocated memory is still 98.6MB. Free memory was 34.5MB in the beginning and 34.2MB in the end (delta: 313.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:26:50,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.72ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 50.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.37ms. Allocated memory is still 98.6MB. Free memory was 50.9MB in the beginning and 78.5MB in the end (delta: -27.6MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.28ms. Allocated memory is still 98.6MB. Free memory was 78.5MB in the beginning and 77.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 202.95ms. Allocated memory is still 98.6MB. Free memory was 77.5MB in the beginning and 67.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1367.45ms. Allocated memory is still 98.6MB. Free memory was 67.5MB in the beginning and 34.5MB in the end (delta: 33.0MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * Witness Printer took 3.28ms. Allocated memory is still 98.6MB. Free memory was 34.5MB in the beginning and 34.2MB in the end (delta: 313.5kB). 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: 29]: 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 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 VAL [__return_main=0, main__i=0, main__tick=2500000037252903/25000000000000000, main__time=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L27] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L29] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 42 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 18 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=3, InterpolantAutomatonStates: 21, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 87 SizeOfPredicates, 0 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 [2021-12-15 23:26:50,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:26:52,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:26:52,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:26:52,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:26:52,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:26:52,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:26:52,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:26:52,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:26:52,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:26:52,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:26:52,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:26:52,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:26:52,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:26:52,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:26:52,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:26:52,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:26:52,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:26:52,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:26:52,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:26:52,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:26:52,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:26:52,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:26:52,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:26:52,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:26:52,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:26:52,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:26:52,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:26:52,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:26:52,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:26:52,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:26:52,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:26:52,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:26:52,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:26:52,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:26:52,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:26:52,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:26:52,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:26:52,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:26:52,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:26:52,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:26:52,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:26:52,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 23:26:52,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:26:52,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:26:52,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:26:52,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:26:52,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:26:52,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:26:52,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:26:52,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:26:52,774 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:26:52,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:26:52,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:26:52,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:26:52,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 23:26:52,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:26:52,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:26:52,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:26:52,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:26:52,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:26:52,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:26:52,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:26:52,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:26:52,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:26:52,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:26:52,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:26:52,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:26:52,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 23:26:52,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-12-15 23:26:53,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:26:53,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:26:53,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:26:53,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:26:53,103 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:26:53,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:53,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196918826/7297fc3d9c3e4f50b6cc490b6e15b5be/FLAG42fb7cdc9 [2021-12-15 23:26:53,517 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:26:53,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:53,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196918826/7297fc3d9c3e4f50b6cc490b6e15b5be/FLAG42fb7cdc9 [2021-12-15 23:26:53,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196918826/7297fc3d9c3e4f50b6cc490b6e15b5be [2021-12-15 23:26:53,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:26:53,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:26:53,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:26:53,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:26:53,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:26:53,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d46e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53, skipping insertion in model container [2021-12-15 23:26:53,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:26:53,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:26:53,717 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/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-12-15 23:26:53,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:26:53,729 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:26:53,743 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/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-12-15 23:26:53,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:26:53,763 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:26:53,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53 WrapperNode [2021-12-15 23:26:53,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:26:53,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:26:53,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:26:53,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:26:53,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,815 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2021-12-15 23:26:53,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:26:53,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:26:53,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:26:53,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:26:53,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:26:53,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:26:53,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:26:53,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:26:53,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (1/1) ... [2021-12-15 23:26:53,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:26:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:26:53,896 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) [2021-12-15 23:26:53,928 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 [2021-12-15 23:26:53,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:26:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:26:53,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:26:53,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 23:26:54,000 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:26:54,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:26:54,158 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:26:54,165 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:26:54,179 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 23:26:54,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:26:54 BoogieIcfgContainer [2021-12-15 23:26:54,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:26:54,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:26:54,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:26:54,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:26:54,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:26:53" (1/3) ... [2021-12-15 23:26:54,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408dc911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:26:54, skipping insertion in model container [2021-12-15 23:26:54,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:26:53" (2/3) ... [2021-12-15 23:26:54,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408dc911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:26:54, skipping insertion in model container [2021-12-15 23:26:54,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:26:54" (3/3) ... [2021-12-15 23:26:54,187 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-12-15 23:26:54,191 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:26:54,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:26:54,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:26:54,268 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 [2021-12-15 23:26:54,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:26:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-15 23:26:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 23:26:54,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:54,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 23:26:54,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-15 23:26:54,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:26:54,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116861928] [2021-12-15 23:26:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:54,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:26:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:26:54,314 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) [2021-12-15 23:26:54,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 23:26:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:26:54,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:26:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:54,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:26:54,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:26:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116861928] [2021-12-15 23:26:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116861928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:26:54,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:26:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:26:54,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030118990] [2021-12-15 23:26:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:26:54,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:26:54,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:26:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:26:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:26:54,486 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 23:26:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:54,625 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-15 23:26:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:26:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-12-15 23:26:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:54,635 INFO L225 Difference]: With dead ends: 16 [2021-12-15 23:26:54,635 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 23:26:54,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:26:54,640 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:54,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 23:26:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 23:26:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 23:26:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:26:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-12-15 23:26:54,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-12-15 23:26:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-12-15 23:26:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 23:26:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-12-15 23:26:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:26:54,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:54,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:26:54,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:26:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:26:54,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2021-12-15 23:26:54,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:26:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311267554] [2021-12-15 23:26:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:26:54,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:26:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:26:54,873 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) [2021-12-15 23:26:54,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 23:26:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:26:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 23:26:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:26:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:54,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:26:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:55,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:26:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311267554] [2021-12-15 23:26:55,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311267554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:26:55,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:26:55,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-15 23:26:55,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267701379] [2021-12-15 23:26:55,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:26:55,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:26:55,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:26:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:26:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:26:55,021 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-15 23:26:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:55,183 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-12-15 23:26:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:26:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 6 [2021-12-15 23:26:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:55,187 INFO L225 Difference]: With dead ends: 13 [2021-12-15 23:26:55,187 INFO L226 Difference]: Without dead ends: 10 [2021-12-15 23:26:55,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:26:55,189 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:55,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 23:26:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-15 23:26:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-15 23:26:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-12-15 23:26:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-15 23:26:55,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2021-12-15 23:26:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:55,191 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-15 23:26:55,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-15 23:26:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-15 23:26:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 23:26:55,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:55,198 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-12-15 23:26:55,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:26:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:26:55,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 2 times [2021-12-15 23:26:55,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:26:55,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96168888] [2021-12-15 23:26:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:26:55,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:26:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:26:55,406 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) [2021-12-15 23:26:55,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 23:26:55,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:26:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:26:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:26:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:26:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:55,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:26:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:26:55,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:26:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96168888] [2021-12-15 23:26:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96168888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:26:55,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:26:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-15 23:26:55,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687436300] [2021-12-15 23:26:55,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:26:55,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 23:26:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:26:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 23:26:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-15 23:26:55,707 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-12-15 23:26:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:26:56,283 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-12-15 23:26:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 23:26:56,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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) Word has length 9 [2021-12-15 23:26:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:26:56,287 INFO L225 Difference]: With dead ends: 19 [2021-12-15 23:26:56,287 INFO L226 Difference]: Without dead ends: 16 [2021-12-15 23:26:56,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-15 23:26:56,289 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:26:56,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 23:26:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-15 23:26:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-15 23:26:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-12-15 23:26:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-12-15 23:26:56,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2021-12-15 23:26:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:26:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-12-15 23:26:56,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-12-15 23:26:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-12-15 23:26:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 23:26:56,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:26:56,294 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-12-15 23:26:56,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-15 23:26:56,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:26:56,505 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:26:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:26:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -763767610, now seen corresponding path program 3 times [2021-12-15 23:26:56,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:26:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879239929] [2021-12-15 23:26:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 23:26:56,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:26:56,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:26:56,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:26:56,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 23:26:56,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 23:26:56,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:26:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 23:26:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:27:42,573 WARN L227 SmtUtils]: Spent 6.82s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)