./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer --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 ab746bf4a089e72e80f9c298a9407c6c1a5ad2bd ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:03:03,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:03:03,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:03:03,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:03:03,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:03:03,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:03:03,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:03:03,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:03:03,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:03:03,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:03:03,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:03:03,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:03:03,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:03:03,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:03:03,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:03:03,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:03:03,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:03:03,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:03:03,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:03:03,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:03:03,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:03:03,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:03:03,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:03:03,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:03:03,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:03:03,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:03:03,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:03:03,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:03:03,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:03:03,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:03:03,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:03:03,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:03:03,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:03:03,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:03:03,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:03:03,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:03:03,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:03:03,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:03:03,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:03:03,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:03:03,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:03:03,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:03:03,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:03:03,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:03:03,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:03:03,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:03:03,490 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:03:03,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:03:03,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:03:03,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:03:03,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:03:03,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:03:03,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:03:03,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:03:03,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:03:03,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:03:03,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:03:03,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:03:03,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:03:03,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:03:03,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:03:03,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:03:03,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:03:03,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:03:03,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:03:03,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:03:03,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:03:03,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:03:03,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:03:03,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:03:03,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:03:03,496 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:/tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab746bf4a089e72e80f9c298a9407c6c1a5ad2bd [2020-11-28 03:03:03,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:03:03,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:03:03,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:03:03,736 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:03:03,737 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:03:03,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c [2020-11-28 03:03:03,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/data/7f161a55a/ab4f2ffb6e8b4806ab1bfa06d88823d1/FLAG03dcea7ab [2020-11-28 03:03:04,222 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:03:04,223 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c [2020-11-28 03:03:04,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/data/7f161a55a/ab4f2ffb6e8b4806ab1bfa06d88823d1/FLAG03dcea7ab [2020-11-28 03:03:04,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/data/7f161a55a/ab4f2ffb6e8b4806ab1bfa06d88823d1 [2020-11-28 03:03:04,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:03:04,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:03:04,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:04,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:03:04,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:03:04,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5f5af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04, skipping insertion in model container [2020-11-28 03:03:04,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:03:04,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:03:04,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:04,877 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:03:04,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:04,924 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:03:04,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04 WrapperNode [2020-11-28 03:03:04,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:04,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:04,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:03:04,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:03:04,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:04,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:03:04,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:03:04,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:03:04,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... [2020-11-28 03:03:04,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:03:04,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:03:04,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:03:04,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:03:04,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:03:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:03:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:03:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:03:05,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:03:05,289 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:03:05,290 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 03:03:05,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:05 BoogieIcfgContainer [2020-11-28 03:03:05,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:03:05,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:03:05,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:03:05,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:03:05,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:03:04" (1/3) ... [2020-11-28 03:03:05,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7e32d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:05, skipping insertion in model container [2020-11-28 03:03:05,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:04" (2/3) ... [2020-11-28 03:03:05,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7e32d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:05, skipping insertion in model container [2020-11-28 03:03:05,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:05" (3/3) ... [2020-11-28 03:03:05,310 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound2.c [2020-11-28 03:03:05,328 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:03:05,346 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:03:05,368 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:03:05,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:03:05,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:03:05,403 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:03:05,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:03:05,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:03:05,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:03:05,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:03:05,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:03:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 03:03:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 03:03:05,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:05,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:03:05,424 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-28 03:03:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:05,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456571238] [2020-11-28 03:03:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:05,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:05,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748891399] [2020-11-28 03:03:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:03:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456571238] [2020-11-28 03:03:05,726 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:05,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748891399] [2020-11-28 03:03:05,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:05,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:03:05,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474093147] [2020-11-28 03:03:05,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:05,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:05,751 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-28 03:03:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:05,849 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-28 03:03:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:03:05,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 03:03:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:05,859 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:03:05,859 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:03:05,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:03:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:03:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-28 03:03:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:03:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-28 03:03:05,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-11-28 03:03:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:05,894 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-28 03:03:05,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-28 03:03:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:03:05,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:05,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:06,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 03:03:06,124 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:06,125 INFO L82 PathProgramCache]: Analyzing trace with hash 885278358, now seen corresponding path program 1 times [2020-11-28 03:03:06,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:06,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025471371] [2020-11-28 03:03:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:06,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:06,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715989234] [2020-11-28 03:03:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:03:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:06,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025471371] [2020-11-28 03:03:06,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715989234] [2020-11-28 03:03:06,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:06,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:03:06,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201815103] [2020-11-28 03:03:06,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:03:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:03:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:03:06,292 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-11-28 03:03:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:06,392 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-28 03:03:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:03:06,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:03:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:06,394 INFO L225 Difference]: With dead ends: 29 [2020-11-28 03:03:06,394 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:03:06,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:03:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-28 03:03:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:03:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-28 03:03:06,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-11-28 03:03:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:06,401 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-28 03:03:06,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:03:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-28 03:03:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:03:06,402 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:06,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-11-28 03:03:06,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:06,615 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 542015330, now seen corresponding path program 2 times [2020-11-28 03:03:06,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:06,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286448247] [2020-11-28 03:03:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:06,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:06,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364806316] [2020-11-28 03:03:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:03:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:03:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:06,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286448247] [2020-11-28 03:03:06,826 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:06,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364806316] [2020-11-28 03:03:06,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:06,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:03:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6852386] [2020-11-28 03:03:06,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:06,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:06,828 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-11-28 03:03:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:06,870 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-28 03:03:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:03:06,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-28 03:03:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:06,871 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:03:06,872 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:03:06,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:03:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 03:03:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:03:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-11-28 03:03:06,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 14 [2020-11-28 03:03:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:06,876 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-11-28 03:03:06,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-11-28 03:03:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:03:06,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:06,878 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:07,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:07,092 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -377436604, now seen corresponding path program 1 times [2020-11-28 03:03:07,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:07,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512330699] [2020-11-28 03:03:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:07,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:07,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128537587] [2020-11-28 03:03:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:03:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512330699] [2020-11-28 03:03:07,363 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128537587] [2020-11-28 03:03:07,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:07,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:03:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138188649] [2020-11-28 03:03:07,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:03:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:03:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:07,366 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 7 states. [2020-11-28 03:03:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:07,459 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2020-11-28 03:03:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:03:07,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 03:03:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:07,460 INFO L225 Difference]: With dead ends: 16 [2020-11-28 03:03:07,460 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:03:07,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:03:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:03:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:03:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:03:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:03:07,462 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-28 03:03:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:07,462 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:03:07,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:03:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:03:07,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:03:07,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:07,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:03:07,862 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:03:07,863 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2020-11-28 03:03:07,863 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 03:03:07,863 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0) (<= 0 ~counter~0)) (and (= ULTIMATE.start_main_~y~0 2) .cse0 (<= 2 ~counter~0) (= ULTIMATE.start_main_~x~0 (+ .cse1 1))) (and (<= 1 ~counter~0) .cse0 (= ULTIMATE.start_main_~x~0 .cse1) (= ULTIMATE.start_main_~y~0 1)))) [2020-11-28 03:03:07,863 INFO L274 CegarLoopResult]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L277 CegarLoopResult]: At program point L38(lines 18 39) the Hoare annotation is: true [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 03:03:07,864 INFO L274 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-11-28 03:03:07,865 INFO L270 CegarLoopResult]: At program point L10-1(lines 30 31) the Hoare annotation is: (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~y~0 1) (<= 2 ~counter~0)) (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~x~0 0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~y~0 0))) [2020-11-28 03:03:07,865 INFO L274 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-11-28 03:03:07,865 INFO L277 CegarLoopResult]: At program point L10-3(lines 9 15) the Hoare annotation is: true [2020-11-28 03:03:07,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:03:07 BoogieIcfgContainer [2020-11-28 03:03:07,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:03:07,894 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:03:07,894 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:03:07,894 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:03:07,895 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:05" (3/4) ... [2020-11-28 03:03:07,898 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:03:07,907 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:03:07,907 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:03:07,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:03:07,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:03:07,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_635eb9ca-c72d-48c7-9a75-740e3d2029ba/bin/uautomizer/witness.graphml [2020-11-28 03:03:07,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:03:07,956 INFO L168 Benchmark]: Toolchain (without parser) took 3324.48 ms. Allocated memory is still 132.1 MB. Free memory was 106.7 MB in the beginning and 57.4 MB in the end (delta: 49.3 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,957 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory is still 53.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:03:07,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.92 ms. Allocated memory is still 132.1 MB. Free memory was 106.7 MB in the beginning and 109.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.31 ms. Allocated memory is still 132.1 MB. Free memory was 109.7 MB in the beginning and 108.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,958 INFO L168 Benchmark]: Boogie Preprocessor took 19.50 ms. Allocated memory is still 132.1 MB. Free memory was 108.0 MB in the beginning and 107.1 MB in the end (delta: 966.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:03:07,959 INFO L168 Benchmark]: RCFGBuilder took 312.85 ms. Allocated memory is still 132.1 MB. Free memory was 107.1 MB in the beginning and 95.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,964 INFO L168 Benchmark]: TraceAbstraction took 2600.89 ms. Allocated memory is still 132.1 MB. Free memory was 94.5 MB in the beginning and 60.2 MB in the end (delta: 34.3 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,966 INFO L168 Benchmark]: Witness Printer took 61.20 ms. Allocated memory is still 132.1 MB. Free memory was 60.2 MB in the beginning and 57.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:07,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory is still 53.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.92 ms. Allocated memory is still 132.1 MB. Free memory was 106.7 MB in the beginning and 109.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.31 ms. Allocated memory is still 132.1 MB. Free memory was 109.7 MB in the beginning and 108.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.50 ms. Allocated memory is still 132.1 MB. Free memory was 108.0 MB in the beginning and 107.1 MB in the end (delta: 966.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 312.85 ms. Allocated memory is still 132.1 MB. Free memory was 107.1 MB in the beginning and 95.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2600.89 ms. Allocated memory is still 132.1 MB. Free memory was 94.5 MB in the beginning and 60.2 MB in the end (delta: 34.3 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. * Witness Printer took 61.20 ms. Allocated memory is still 132.1 MB. Free memory was 60.2 MB in the beginning and 57.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((x == 0 && y == 0) && 0 <= counter) || (((y == 2 && 1 <= cond) && 2 <= counter) && x == y * y + 1)) || (((1 <= counter && 1 <= cond) && x == y * y) && y == 1) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((1 == cond && x == y * y) && y == 1) && 2 <= counter) || (((1 <= counter && x == 0) && 1 <= cond) && y == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 38 SDslu, 77 SDs, 0 SdLazy, 75 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 13 NumberOfFragments, 74 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 2479 SizeOfPredicates, 16 NumberOfNonLiveVariables, 305 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 8/21 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 proved your program to be correct! Received shutdown request...