./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/array-fpi/s4iff.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 98b440d2018d3020f67dce8008e7aad4265ed1f1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:39:41,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:39:41,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:39:41,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:39:41,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:39:41,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:39:41,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:39:41,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:39:41,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:39:41,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:39:41,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:39:41,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:39:41,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:39:41,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:39:41,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:39:41,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:39:41,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:39:41,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:39:41,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:39:41,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:39:41,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:39:41,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:39:41,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:39:41,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:39:41,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:39:41,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:39:41,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:39:41,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:39:41,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:39:41,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:39:41,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:39:41,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:39:41,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:39:41,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:39:41,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:39:41,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:39:41,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:39:41,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:39:41,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:39:41,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:39:41,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:39:41,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:39:41,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:39:41,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:39:41,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:39:41,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:39:41,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:39:41,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:39:41,385 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:39:41,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:39:41,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:39:41,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:39:41,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:39:41,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:39:41,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:39:41,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:39:41,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:39:41,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:39:41,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:39:41,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:39:41,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:39:41,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:39:41,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:39:41,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:39:41,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:39:41,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:39:41,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:39:41,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:39:41,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:39:41,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:39:41,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:39:41,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:39:41,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98b440d2018d3020f67dce8008e7aad4265ed1f1 [2021-08-25 19:39:41,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:39:41,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:39:41,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:39:41,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:39:41,696 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:39:41,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4iff.c [2021-08-25 19:39:41,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c295637/cda121981ae4499691e7f954773848fe/FLAGa3d62d6da [2021-08-25 19:39:42,109 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:39:42,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4iff.c [2021-08-25 19:39:42,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c295637/cda121981ae4499691e7f954773848fe/FLAGa3d62d6da [2021-08-25 19:39:42,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c295637/cda121981ae4499691e7f954773848fe [2021-08-25 19:39:42,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:39:42,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:39:42,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:39:42,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:39:42,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:39:42,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55376e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42, skipping insertion in model container [2021-08-25 19:39:42,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:39:42,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:39:42,259 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-08-25 19:39:42,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:39:42,279 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:39:42,316 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-08-25 19:39:42,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:39:42,334 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:39:42,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42 WrapperNode [2021-08-25 19:39:42,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:39:42,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:39:42,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:39:42,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:39:42,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:39:42,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:39:42,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:39:42,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:39:42,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:39:42,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:39:42,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:39:42,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:39:42,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (1/1) ... [2021-08-25 19:39:42,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:39:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:39:42,430 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) [2021-08-25 19:39:42,451 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 [2021-08-25 19:39:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:39:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:39:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:39:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:39:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:39:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:39:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:39:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 19:39:42,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:39:42,671 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-25 19:39:42,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:39:42 BoogieIcfgContainer [2021-08-25 19:39:42,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:39:42,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:39:42,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:39:42,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:39:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:39:42" (1/3) ... [2021-08-25 19:39:42,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb94db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:39:42, skipping insertion in model container [2021-08-25 19:39:42,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:39:42" (2/3) ... [2021-08-25 19:39:42,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb94db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:39:42, skipping insertion in model container [2021-08-25 19:39:42,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:39:42" (3/3) ... [2021-08-25 19:39:42,690 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2021-08-25 19:39:42,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:39:42,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:39:42,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:39:42,726 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 19:39:42,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:39:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-08-25 19:39:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 19:39:42,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:42,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:42,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-08-25 19:39:42,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:42,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009645579] [2021-08-25 19:39:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:42,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:42,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:39:42,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009645579] [2021-08-25 19:39:42,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009645579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:39:42,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:39:42,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:39:42,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870962621] [2021-08-25 19:39:42,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:39:42,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:39:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:39:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:39:42,919 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-08-25 19:39:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:39:42,929 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-08-25 19:39:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:39:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 11 [2021-08-25 19:39:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:39:42,934 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:39:42,934 INFO L226 Difference]: Without dead ends: 15 [2021-08-25 19:39:42,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:39:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-25 19:39:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-25 19:39:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-08-25 19:39:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-25 19:39:42,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-08-25 19:39:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:39:42,957 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-25 19:39:42,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-08-25 19:39:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-25 19:39:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 19:39:42,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:42,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:42,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:39:42,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-08-25 19:39:42,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:42,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596500712] [2021-08-25 19:39:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:42,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:43,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:39:43,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596500712] [2021-08-25 19:39:43,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596500712] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:39:43,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:39:43,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 19:39:43,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052289453] [2021-08-25 19:39:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:39:43,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:39:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:39:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:39:43,033 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-08-25 19:39:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:39:43,064 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-08-25 19:39:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:39:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2021-08-25 19:39:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:39:43,065 INFO L225 Difference]: With dead ends: 28 [2021-08-25 19:39:43,065 INFO L226 Difference]: Without dead ends: 20 [2021-08-25 19:39:43,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:39:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-25 19:39:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-08-25 19:39:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-08-25 19:39:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:39:43,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-08-25 19:39:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:39:43,069 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:39:43,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-08-25 19:39:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:39:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:39:43,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:43,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:43,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:39:43,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-08-25 19:39:43,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:43,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279365607] [2021-08-25 19:39:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:43,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:43,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:39:43,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279365607] [2021-08-25 19:39:43,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279365607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:43,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789443270] [2021-08-25 19:39:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:43,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:39:43,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:39:43,425 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) [2021-08-25 19:39:43,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:39:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-25 19:39:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:39:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-25 19:39:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:39:43,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-25 19:39:43,913 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-08-25 19:39:43,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 53 [2021-08-25 19:39:44,216 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-25 19:39:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 50 [2021-08-25 19:39:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:44,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789443270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:44,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:39:44,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-25 19:39:44,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873536014] [2021-08-25 19:39:44,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-25 19:39:44,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:39:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-25 19:39:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-25 19:39:44,254 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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) [2021-08-25 19:39:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:39:44,507 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-08-25 19:39:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:39:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 16 [2021-08-25 19:39:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:39:44,509 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:39:44,510 INFO L226 Difference]: Without dead ends: 26 [2021-08-25 19:39:44,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-25 19:39:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-25 19:39:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-08-25 19:39:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-08-25 19:39:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:39:44,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-08-25 19:39:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:39:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:39:44,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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) [2021-08-25 19:39:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:39:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:39:44,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:44,514 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:44,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:39:44,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:39:44,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-08-25 19:39:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:44,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552743120] [2021-08-25 19:39:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:44,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:44,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:39:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552743120] [2021-08-25 19:39:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552743120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:44,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898911415] [2021-08-25 19:39:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:39:44,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:39:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:39:44,797 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) [2021-08-25 19:39:44,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:39:44,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:39:44,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:39:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:39:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:39:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:44,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898911415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:44,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:39:44,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-25 19:39:44,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175023466] [2021-08-25 19:39:44,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:39:44,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:39:44,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:39:44,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:39:44,988 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-08-25 19:39:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:39:45,104 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-25 19:39:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:39:45,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 18 [2021-08-25 19:39:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:39:45,105 INFO L225 Difference]: With dead ends: 33 [2021-08-25 19:39:45,105 INFO L226 Difference]: Without dead ends: 29 [2021-08-25 19:39:45,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:39:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-25 19:39:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-08-25 19:39:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-08-25 19:39:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-25 19:39:45,109 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-08-25 19:39:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:39:45,109 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-25 19:39:45,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-08-25 19:39:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-25 19:39:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 19:39:45,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:45,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:45,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:39:45,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-25 19:39:45,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-08-25 19:39:45,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:45,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220294618] [2021-08-25 19:39:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:45,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:39:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:45,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:39:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220294618] [2021-08-25 19:39:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220294618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314789235] [2021-08-25 19:39:45,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:39:45,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:39:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:39:45,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:39:45,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:39:45,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:39:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:39:45,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:39:45,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:39:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:39:45,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314789235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:39:45,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:39:45,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-25 19:39:45,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784946077] [2021-08-25 19:39:45,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:39:45,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:39:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:39:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:39:45,574 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-25 19:39:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:39:45,662 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-08-25 19:39:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:39:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 19 [2021-08-25 19:39:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:39:45,663 INFO L225 Difference]: With dead ends: 37 [2021-08-25 19:39:45,663 INFO L226 Difference]: Without dead ends: 25 [2021-08-25 19:39:45,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:39:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-25 19:39:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-25 19:39:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-08-25 19:39:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-25 19:39:45,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-08-25 19:39:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:39:45,667 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-25 19:39:45,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-25 19:39:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-25 19:39:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 19:39:45,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:39:45,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:39:45,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:39:45,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:39:45,883 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:39:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:39:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-08-25 19:39:45,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:39:45,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470995339] [2021-08-25 19:39:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:39:45,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:39:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:39:45,896 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 19:39:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:39:45,927 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 19:39:45,927 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 19:39:45,928 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:39:45,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 19:39:45,932 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:39:45,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:39:45 BoogieIcfgContainer [2021-08-25 19:39:45,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:39:45,955 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:39:45,955 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:39:45,955 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:39:45,955 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:39:42" (3/4) ... [2021-08-25 19:39:45,956 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 19:39:45,986 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:39:45,986 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:39:45,986 INFO L168 Benchmark]: Toolchain (without parser) took 3855.05 ms. Allocated memory was 62.9 MB in the beginning and 111.1 MB in the end (delta: 48.2 MB). Free memory was 44.4 MB in the beginning and 55.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 36.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,987 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 45.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:39:45,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.50 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 46.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 44.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:39:45,988 INFO L168 Benchmark]: Boogie Preprocessor took 33.39 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,988 INFO L168 Benchmark]: RCFGBuilder took 266.28 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 43.5 MB in the beginning and 58.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,988 INFO L168 Benchmark]: TraceAbstraction took 3279.73 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 58.0 MB in the beginning and 58.6 MB in the end (delta: -513.1 kB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,989 INFO L168 Benchmark]: Witness Printer took 31.20 ms. Allocated memory is still 111.1 MB. Free memory was 58.6 MB in the beginning and 55.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:39:45,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 45.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 202.50 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 46.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 44.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.39 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 266.28 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 43.5 MB in the beginning and 58.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3279.73 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 58.0 MB in the beginning and 58.6 MB in the end (delta: -513.1 kB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. * Witness Printer took 31.20 ms. Allocated memory is still 111.1 MB. Free memory was 58.6 MB in the beginning and 55.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i