./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.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_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 61245002f662171c4f63dbacefaa0e216ea9fe3a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:49:08,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:49:08,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:49:08,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:49:08,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:49:08,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:49:08,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:49:08,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:49:08,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:49:08,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:49:08,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:49:08,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:49:08,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:49:08,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:49:08,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:49:08,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:49:08,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:49:08,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:49:08,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:49:08,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:49:08,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:49:08,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:49:08,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:49:08,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:49:08,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:49:08,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:49:08,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:49:08,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:49:08,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:49:08,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:49:08,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:49:08,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:49:08,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:49:08,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:49:08,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:49:08,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:49:08,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:49:08,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:49:08,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:49:08,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:49:08,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:49:08,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:49:08,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:49:08,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:49:08,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:49:08,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:49:08,994 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:49:08,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:49:08,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:49:08,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:49:08,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:49:08,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:49:08,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:49:08,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:49:08,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:49:08,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:49:08,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:49:08,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:49:08,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:49:08,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:49:09,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:49:09,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:49:09,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:49:09,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:49:09,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:49:09,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:49:09,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:49:09,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:49:09,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:49:09,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:49:09,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:49:09,003 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_1238dcac-d497-4a81-b49c-1a07b4e2238f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61245002f662171c4f63dbacefaa0e216ea9fe3a [2020-11-30 00:49:09,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:49:09,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:49:09,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:49:09,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:49:09,375 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:49:09,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-11-30 00:49:09,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/data/cd3b7f027/6e27c3d884f041349dd2c5b9640dea7f/FLAG19e92dd17 [2020-11-30 00:49:10,112 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:49:10,112 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-11-30 00:49:10,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/data/cd3b7f027/6e27c3d884f041349dd2c5b9640dea7f/FLAG19e92dd17 [2020-11-30 00:49:10,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/data/cd3b7f027/6e27c3d884f041349dd2c5b9640dea7f [2020-11-30 00:49:10,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:49:10,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:49:10,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:49:10,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:49:10,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:49:10,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515d7b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10, skipping insertion in model container [2020-11-30 00:49:10,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:49:10,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:49:10,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:49:10,747 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:49:10,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:49:10,810 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:49:10,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10 WrapperNode [2020-11-30 00:49:10,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:49:10,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:49:10,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:49:10,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:49:10,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:49:10,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:49:10,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:49:10,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:49:10,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... [2020-11-30 00:49:10,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:49:10,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:49:10,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:49:10,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:49:10,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 [2020-11-30 00:49:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:49:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-30 00:49:10,949 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-30 00:49:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:49:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-30 00:49:10,953 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-30 00:49:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:49:10,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:49:11,271 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:49:11,272 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:49:11,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:49:11 BoogieIcfgContainer [2020-11-30 00:49:11,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:49:11,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:49:11,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:49:11,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:49:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:49:10" (1/3) ... [2020-11-30 00:49:11,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c572f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:49:11, skipping insertion in model container [2020-11-30 00:49:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:49:10" (2/3) ... [2020-11-30 00:49:11,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c572f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:49:11, skipping insertion in model container [2020-11-30 00:49:11,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:49:11" (3/3) ... [2020-11-30 00:49:11,305 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-11-30 00:49:11,330 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:49:11,335 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:49:11,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:49:11,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:49:11,375 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:49:11,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:49:11,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:49:11,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:49:11,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:49:11,376 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:49:11,376 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:49:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-30 00:49:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:49:11,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:11,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:11,404 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-30 00:49:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:11,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388900241] [2020-11-30 00:49:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:49:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388900241] [2020-11-30 00:49:11,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:49:11,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:49:11,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577547107] [2020-11-30 00:49:11,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:49:11,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:49:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:49:11,779 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-30 00:49:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:11,937 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-11-30 00:49:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:49:11,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:49:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:11,951 INFO L225 Difference]: With dead ends: 40 [2020-11-30 00:49:11,951 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 00:49:11,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:49:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 00:49:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 00:49:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:49:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 00:49:12,009 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-30 00:49:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:12,010 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 00:49:12,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:49:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 00:49:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 00:49:12,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:12,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:12,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:49:12,013 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-30 00:49:12,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:12,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846750542] [2020-11-30 00:49:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:49:12,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846750542] [2020-11-30 00:49:12,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:49:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:49:12,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535375862] [2020-11-30 00:49:12,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:49:12,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:49:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:49:12,149 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-30 00:49:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:12,252 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-30 00:49:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:49:12,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 00:49:12,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:12,256 INFO L225 Difference]: With dead ends: 33 [2020-11-30 00:49:12,257 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 00:49:12,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:49:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 00:49:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 00:49:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:49:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 00:49:12,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-30 00:49:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:12,269 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 00:49:12,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:49:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 00:49:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:49:12,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:12,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:12,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:49:12,278 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-30 00:49:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:12,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098881247] [2020-11-30 00:49:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:49:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:49:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098881247] [2020-11-30 00:49:12,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246430372] [2020-11-30 00:49:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 [2020-11-30 00:49:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:49:12,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:49:12,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:12,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-30 00:49:12,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575712590] [2020-11-30 00:49:12,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 00:49:12,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:49:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:49:12,749 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-30 00:49:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:13,029 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-30 00:49:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:49:13,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-30 00:49:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:13,033 INFO L225 Difference]: With dead ends: 55 [2020-11-30 00:49:13,033 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 00:49:13,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:49:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 00:49:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-30 00:49:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 00:49:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-30 00:49:13,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-30 00:49:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:13,051 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-30 00:49:13,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 00:49:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-30 00:49:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:49:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:13,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:13,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 00:49:13,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:13,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-30 00:49:13,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:13,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893204528] [2020-11-30 00:49:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:13,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:49:13,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893204528] [2020-11-30 00:49:13,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111745136] [2020-11-30 00:49:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 [2020-11-30 00:49:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:49:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:49:13,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:13,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-30 00:49:13,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842199418] [2020-11-30 00:49:13,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:49:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:49:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:49:13,611 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-30 00:49:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:13,894 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-30 00:49:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:49:13,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-30 00:49:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:13,899 INFO L225 Difference]: With dead ends: 51 [2020-11-30 00:49:13,899 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 00:49:13,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:49:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 00:49:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-30 00:49:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 00:49:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-30 00:49:13,921 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-30 00:49:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:13,921 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-30 00:49:13,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:49:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-30 00:49:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 00:49:13,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:13,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:14,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:14,132 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-30 00:49:14,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:14,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715737917] [2020-11-30 00:49:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:49:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-30 00:49:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:49:14,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715737917] [2020-11-30 00:49:14,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402467128] [2020-11-30 00:49:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 [2020-11-30 00:49:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:49:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:49:14,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:14,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-30 00:49:14,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140273734] [2020-11-30 00:49:14,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 00:49:14,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:14,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 00:49:14,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:49:14,530 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-30 00:49:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:14,924 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-30 00:49:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 00:49:14,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-30 00:49:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:14,929 INFO L225 Difference]: With dead ends: 105 [2020-11-30 00:49:14,929 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 00:49:14,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:49:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 00:49:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-30 00:49:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-30 00:49:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-30 00:49:14,962 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-30 00:49:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:14,962 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-30 00:49:14,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 00:49:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-30 00:49:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-30 00:49:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:14,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:15,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:15,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-30 00:49:15,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:15,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594750292] [2020-11-30 00:49:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 00:49:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594750292] [2020-11-30 00:49:15,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644034124] [2020-11-30 00:49:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/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 [2020-11-30 00:49:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:49:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:49:15,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:15,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-30 00:49:15,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993943227] [2020-11-30 00:49:15,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 00:49:15,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 00:49:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:49:15,624 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-30 00:49:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:16,230 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-30 00:49:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 00:49:16,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-30 00:49:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:16,235 INFO L225 Difference]: With dead ends: 177 [2020-11-30 00:49:16,235 INFO L226 Difference]: Without dead ends: 117 [2020-11-30 00:49:16,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-30 00:49:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-30 00:49:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-30 00:49:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-30 00:49:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-30 00:49:16,273 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-30 00:49:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:16,274 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-30 00:49:16,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 00:49:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-30 00:49:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 00:49:16,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:16,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:16,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:16,492 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-30 00:49:16,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:16,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225521402] [2020-11-30 00:49:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-30 00:49:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 00:49:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225521402] [2020-11-30 00:49:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580598091] [2020-11-30 00:49:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:16,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:49:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 00:49:17,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:17,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-11-30 00:49:17,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489754925] [2020-11-30 00:49:17,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:49:17,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:49:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:49:17,108 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 14 states. [2020-11-30 00:49:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:17,913 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-11-30 00:49:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 00:49:17,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-30 00:49:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:17,926 INFO L225 Difference]: With dead ends: 255 [2020-11-30 00:49:17,927 INFO L226 Difference]: Without dead ends: 155 [2020-11-30 00:49:17,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:49:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-30 00:49:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-11-30 00:49:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-30 00:49:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-11-30 00:49:17,993 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-11-30 00:49:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:17,993 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-11-30 00:49:17,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:49:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-11-30 00:49:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-30 00:49:18,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:18,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:18,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 00:49:18,228 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1732889556, now seen corresponding path program 1 times [2020-11-30 00:49:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:18,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618120299] [2020-11-30 00:49:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-30 00:49:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-11-30 00:49:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618120299] [2020-11-30 00:49:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414978793] [2020-11-30 00:49:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:49:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-11-30 00:49:18,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:18,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-11-30 00:49:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468651198] [2020-11-30 00:49:18,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:49:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:49:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:49:18,952 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 14 states. [2020-11-30 00:49:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:19,576 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-11-30 00:49:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 00:49:19,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-11-30 00:49:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:19,580 INFO L225 Difference]: With dead ends: 241 [2020-11-30 00:49:19,580 INFO L226 Difference]: Without dead ends: 120 [2020-11-30 00:49:19,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-30 00:49:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-30 00:49:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-11-30 00:49:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-30 00:49:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-11-30 00:49:19,612 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 93 [2020-11-30 00:49:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:19,612 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-11-30 00:49:19,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:49:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-11-30 00:49:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-30 00:49:19,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:19,615 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:19,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:19,844 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1676450270, now seen corresponding path program 2 times [2020-11-30 00:49:19,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:19,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443901474] [2020-11-30 00:49:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:19,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 00:49:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-30 00:49:20,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443901474] [2020-11-30 00:49:20,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587857806] [2020-11-30 00:49:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:49:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:49:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:49:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-30 00:49:20,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:20,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2020-11-30 00:49:20,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316064064] [2020-11-30 00:49:20,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:49:20,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:49:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:49:20,387 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 14 states. [2020-11-30 00:49:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:20,927 INFO L93 Difference]: Finished difference Result 212 states and 383 transitions. [2020-11-30 00:49:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 00:49:20,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-11-30 00:49:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:20,936 INFO L225 Difference]: With dead ends: 212 [2020-11-30 00:49:20,936 INFO L226 Difference]: Without dead ends: 123 [2020-11-30 00:49:20,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-30 00:49:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-30 00:49:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-11-30 00:49:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-30 00:49:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 183 transitions. [2020-11-30 00:49:20,981 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 183 transitions. Word has length 92 [2020-11-30 00:49:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:20,987 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 183 transitions. [2020-11-30 00:49:20,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:49:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 183 transitions. [2020-11-30 00:49:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-30 00:49:20,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:20,994 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:21,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:21,204 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1836149343, now seen corresponding path program 3 times [2020-11-30 00:49:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:21,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053483017] [2020-11-30 00:49:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:21,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 00:49:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:22,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-11-30 00:49:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053483017] [2020-11-30 00:49:22,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135978428] [2020-11-30 00:49:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:22,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-30 00:49:22,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:49:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2020-11-30 00:49:22,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-11-30 00:49:22,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:22,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-11-30 00:49:22,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824452529] [2020-11-30 00:49:22,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 00:49:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 00:49:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-11-30 00:49:22,781 INFO L87 Difference]: Start difference. First operand 117 states and 183 transitions. Second operand 28 states. [2020-11-30 00:49:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:23,211 INFO L93 Difference]: Finished difference Result 153 states and 269 transitions. [2020-11-30 00:49:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:49:23,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-11-30 00:49:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:23,215 INFO L225 Difference]: With dead ends: 153 [2020-11-30 00:49:23,215 INFO L226 Difference]: Without dead ends: 149 [2020-11-30 00:49:23,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-11-30 00:49:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-30 00:49:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2020-11-30 00:49:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-30 00:49:23,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 217 transitions. [2020-11-30 00:49:23,247 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 217 transitions. Word has length 106 [2020-11-30 00:49:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:23,248 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 217 transitions. [2020-11-30 00:49:23,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 00:49:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 217 transitions. [2020-11-30 00:49:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-30 00:49:23,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:23,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:23,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 00:49:23,464 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash -738302103, now seen corresponding path program 4 times [2020-11-30 00:49:23,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:23,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259563396] [2020-11-30 00:49:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-30 00:49:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-30 00:49:23,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259563396] [2020-11-30 00:49:23,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274286688] [2020-11-30 00:49:23,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:23,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:49:23,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:49:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:49:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-30 00:49:23,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:23,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-11-30 00:49:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214925451] [2020-11-30 00:49:23,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 00:49:23,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:23,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 00:49:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-11-30 00:49:23,958 INFO L87 Difference]: Start difference. First operand 130 states and 217 transitions. Second operand 17 states. [2020-11-30 00:49:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:24,720 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2020-11-30 00:49:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-30 00:49:24,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 107 [2020-11-30 00:49:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:24,723 INFO L225 Difference]: With dead ends: 302 [2020-11-30 00:49:24,723 INFO L226 Difference]: Without dead ends: 133 [2020-11-30 00:49:24,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-11-30 00:49:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-30 00:49:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-11-30 00:49:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-30 00:49:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-11-30 00:49:24,739 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 107 [2020-11-30 00:49:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:24,740 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-11-30 00:49:24,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 00:49:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-11-30 00:49:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-30 00:49:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:24,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:24,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:24,960 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2057361993, now seen corresponding path program 5 times [2020-11-30 00:49:24,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:24,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916734021] [2020-11-30 00:49:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 00:49:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-11-30 00:49:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916734021] [2020-11-30 00:49:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881574709] [2020-11-30 00:49:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:25,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-30 00:49:25,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:49:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:49:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 118 proven. 134 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-11-30 00:49:25,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:25,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-11-30 00:49:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541616634] [2020-11-30 00:49:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 00:49:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:49:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:49:25,569 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 20 states. [2020-11-30 00:49:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:26,380 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2020-11-30 00:49:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-30 00:49:26,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 133 [2020-11-30 00:49:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:26,383 INFO L225 Difference]: With dead ends: 260 [2020-11-30 00:49:26,383 INFO L226 Difference]: Without dead ends: 138 [2020-11-30 00:49:26,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 00:49:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-30 00:49:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2020-11-30 00:49:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-30 00:49:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2020-11-30 00:49:26,397 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 133 [2020-11-30 00:49:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:26,397 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2020-11-30 00:49:26,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 00:49:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2020-11-30 00:49:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-30 00:49:26,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:26,400 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:26,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:26,616 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:49:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -808293890, now seen corresponding path program 1 times [2020-11-30 00:49:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:26,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447675907] [2020-11-30 00:49:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 00:49:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-30 00:49:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-30 00:49:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:49:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:49:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 00:49:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-11-30 00:49:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447675907] [2020-11-30 00:49:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548213570] [2020-11-30 00:49:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:49:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-30 00:49:27,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:27,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-11-30 00:49:27,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384304347] [2020-11-30 00:49:27,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 00:49:27,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 00:49:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:49:27,181 INFO L87 Difference]: Start difference. First operand 119 states and 156 transitions. Second operand 16 states. [2020-11-30 00:49:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:27,506 INFO L93 Difference]: Finished difference Result 223 states and 311 transitions. [2020-11-30 00:49:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 00:49:27,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-11-30 00:49:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:27,507 INFO L225 Difference]: With dead ends: 223 [2020-11-30 00:49:27,507 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:49:27,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:49:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:49:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:49:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:49:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:49:27,509 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2020-11-30 00:49:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:27,509 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:49:27,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 00:49:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:49:27,510 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:49:27,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 00:49:27,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 00:49:28,763 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 24 [2020-11-30 00:49:29,287 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 28 [2020-11-30 00:49:29,351 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:49:29,351 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:49:29,351 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:49:29,351 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:49:29,351 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L270 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 00:49:29,352 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-11-30 00:49:29,352 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-11-30 00:49:29,352 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret9| 1) .cse0 (<= 1 |fibo2_#t~ret9|)) (and (<= 4 fibo2_~n) .cse0))) (or (<= |fibo2_#in~n| 3) (and (<= |fibo2_#t~ret9| 2) (<= 2 |fibo2_#t~ret9|)) (<= 5 |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 2))) [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-11-30 00:49:29,353 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-11-30 00:49:29,353 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-11-30 00:49:29,353 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-30 00:49:29,354 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (and (or (not (<= |fibo1_#in~n| 3)) (and (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1) .cse0)) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#in~n| 2) (<= 2 |fibo1_#in~n|))) (or (<= |fibo1_#in~n| 4) (and (<= 3 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 3)) (<= 6 |fibo1_#in~n|)))) [2020-11-30 00:49:29,354 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-11-30 00:49:29,354 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-11-30 00:49:29,354 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-11-30 00:49:29,354 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-11-30 00:49:29,354 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-11-30 00:49:29,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:49:29 BoogieIcfgContainer [2020-11-30 00:49:29,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:49:29,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:49:29,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:49:29,368 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:49:29,368 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:49:11" (3/4) ... [2020-11-30 00:49:29,372 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:49:29,376 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-11-30 00:49:29,376 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-11-30 00:49:29,380 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 00:49:29,380 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:49:29,380 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:49:29,381 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:49:29,420 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1238dcac-d497-4a81-b49c-1a07b4e2238f/bin/uautomizer/witness.graphml [2020-11-30 00:49:29,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:49:29,421 INFO L168 Benchmark]: Toolchain (without parser) took 18922.88 ms. Allocated memory was 90.2 MB in the beginning and 237.0 MB in the end (delta: 146.8 MB). Free memory was 62.1 MB in the beginning and 90.4 MB in the end (delta: -28.3 MB). Peak memory consumption was 117.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,422 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 90.2 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:49:29,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.73 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 61.9 MB in the beginning and 90.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.25 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:49:29,424 INFO L168 Benchmark]: Boogie Preprocessor took 24.03 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,425 INFO L168 Benchmark]: RCFGBuilder took 407.20 ms. Allocated memory is still 113.2 MB. Free memory was 87.9 MB in the beginning and 75.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,425 INFO L168 Benchmark]: TraceAbstraction took 18070.63 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 75.0 MB in the beginning and 93.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 126.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,426 INFO L168 Benchmark]: Witness Printer took 52.60 ms. Allocated memory is still 237.0 MB. Free memory was 92.4 MB in the beginning and 90.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:29,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 90.2 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.73 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 61.9 MB in the beginning and 90.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.25 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.03 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 407.20 ms. Allocated memory is still 113.2 MB. Free memory was 87.9 MB in the beginning and 75.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18070.63 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 75.0 MB in the beginning and 93.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 126.5 MB. Max. memory is 16.1 GB. * Witness Printer took 52.60 ms. Allocated memory is still 237.0 MB. Free memory was 92.4 MB in the beginning and 90.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.3s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 389 SDtfs, 542 SDslu, 3052 SDs, 0 SdLazy, 3789 SolverSat, 547 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1294 GetRequests, 1039 SyntacticMatches, 10 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 142 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 557 PreInvPairs, 822 NumberOfFragments, 109 HoareAnnotationTreeSize, 557 FomulaSimplifications, 7652 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3967 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 1665 NumberOfCodeBlocks, 1600 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1641 ConstructedInterpolants, 0 QuantifiedInterpolants, 314863 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1928 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 2527/3582 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...