./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 f8ce463a68003145f68f57eef3f97a99b93a908a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:58:42,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:58:42,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:58:42,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:58:42,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:58:42,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:58:42,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:58:42,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:58:42,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:58:42,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:58:42,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:58:42,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:58:42,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:58:42,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:58:42,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:58:42,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:58:42,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:58:42,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:58:42,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:58:42,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:58:42,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:58:42,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:58:42,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:58:42,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:58:42,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:58:42,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:58:42,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:58:42,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:58:42,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:58:42,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:58:42,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:58:42,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:58:42,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:58:42,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:58:42,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:58:42,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:58:42,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:58:42,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:58:42,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:58:42,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:58:42,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:58:42,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:58:42,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:58:42,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:58:42,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:58:42,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:58:42,606 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:58:42,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:58:42,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:58:42,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:58:42,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:58:42,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:58:42,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:58:42,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:58:42,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:58:42,610 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:58:42,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:58:42,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:58:42,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:58:42,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:58:42,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:58:42,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:58:42,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:58:42,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:58:42,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:58:42,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:58:42,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:58:42,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:58:42,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:58:42,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:58:42,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:58:42,615 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_ba00e88d-2135-4baf-aa9d-2877ffed372d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8ce463a68003145f68f57eef3f97a99b93a908a [2020-12-01 15:58:42,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:58:43,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:58:43,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:58:43,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:58:43,043 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:58:43,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-12-01 15:58:43,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/data/00c49bb5b/74225bdb5c73475da819d2ffe4672b42/FLAG20e8e70f6 [2020-12-01 15:58:43,797 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:58:43,797 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-12-01 15:58:43,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/data/00c49bb5b/74225bdb5c73475da819d2ffe4672b42/FLAG20e8e70f6 [2020-12-01 15:58:44,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/data/00c49bb5b/74225bdb5c73475da819d2ffe4672b42 [2020-12-01 15:58:44,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:58:44,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:58:44,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:58:44,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:58:44,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:58:44,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4555cc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44, skipping insertion in model container [2020-12-01 15:58:44,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:58:44,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:58:44,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:58:44,449 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:58:44,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:58:44,486 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:58:44,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44 WrapperNode [2020-12-01 15:58:44,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:58:44,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:58:44,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:58:44,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:58:44,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:58:44,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:58:44,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:58:44,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:58:44,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... [2020-12-01 15:58:44,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:58:44,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:58:44,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:58:44,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:58:44,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:44,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:58:44,647 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-01 15:58:44,647 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-01 15:58:44,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:58:44,648 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-01 15:58:44,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-01 15:58:44,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:58:44,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:58:44,939 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:58:44,949 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:58:44,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:58:44 BoogieIcfgContainer [2020-12-01 15:58:44,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:58:44,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:58:44,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:58:44,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:58:44,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:58:44" (1/3) ... [2020-12-01 15:58:44,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e31dc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:58:44, skipping insertion in model container [2020-12-01 15:58:44,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:58:44" (2/3) ... [2020-12-01 15:58:44,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e31dc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:58:44, skipping insertion in model container [2020-12-01 15:58:44,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:58:44" (3/3) ... [2020-12-01 15:58:44,983 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-12-01 15:58:45,016 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:58:45,020 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:58:45,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:58:45,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:58:45,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:58:45,071 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:58:45,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:58:45,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:58:45,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:58:45,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:58:45,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:58:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-01 15:58:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:58:45,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:45,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:45,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-12-01 15:58:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:45,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927281418] [2020-12-01 15:58:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:45,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:58:45,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927281418] [2020-12-01 15:58:45,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:58:45,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:58:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116479894] [2020-12-01 15:58:45,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:58:45,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:58:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:58:45,447 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-12-01 15:58:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:45,582 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-01 15:58:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:58:45,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-01 15:58:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:45,599 INFO L225 Difference]: With dead ends: 40 [2020-12-01 15:58:45,599 INFO L226 Difference]: Without dead ends: 27 [2020-12-01 15:58:45,604 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 [2020-12-01 15:58:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-01 15:58:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-01 15:58:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 15:58:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-01 15:58:45,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-12-01 15:58:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:45,662 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-01 15:58:45,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:58:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-01 15:58:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:58:45,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:45,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:45,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:58:45,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-12-01 15:58:45,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:45,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391541301] [2020-12-01 15:58:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:58:45,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391541301] [2020-12-01 15:58:45,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:58:45,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:58:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558250025] [2020-12-01 15:58:45,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:58:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:58:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:58:45,768 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-12-01 15:58:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:45,879 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-01 15:58:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:58:45,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-01 15:58:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:45,885 INFO L225 Difference]: With dead ends: 33 [2020-12-01 15:58:45,886 INFO L226 Difference]: Without dead ends: 29 [2020-12-01 15:58:45,887 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 [2020-12-01 15:58:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-01 15:58:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-01 15:58:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 15:58:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-01 15:58:45,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-12-01 15:58:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:45,913 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-01 15:58:45,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:58:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-01 15:58:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:58:45,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:45,919 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] [2020-12-01 15:58:45,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:58:45,921 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-12-01 15:58:45,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:45,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232150187] [2020-12-01 15:58:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:46,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:46,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:46,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-01 15:58:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:58:46,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232150187] [2020-12-01 15:58:46,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358765779] [2020-12-01 15:58:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:58:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:58:46,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:46,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-12-01 15:58:46,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444545899] [2020-12-01 15:58:46,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:58:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:58:46,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:58:46,443 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-12-01 15:58:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:46,758 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-12-01 15:58:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:58:46,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-01 15:58:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:46,761 INFO L225 Difference]: With dead ends: 55 [2020-12-01 15:58:46,762 INFO L226 Difference]: Without dead ends: 31 [2020-12-01 15:58:46,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:58:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-01 15:58:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-01 15:58:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-01 15:58:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-01 15:58:46,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-12-01 15:58:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:46,775 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-01 15:58:46,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:58:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-01 15:58:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:58:46,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:46,778 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] [2020-12-01 15:58:47,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-01 15:58:47,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:47,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-12-01 15:58:47,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:47,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039767725] [2020-12-01 15:58:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:58:47,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039767725] [2020-12-01 15:58:47,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586064952] [2020-12-01 15:58:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:58:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:58:47,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:47,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-01 15:58:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195863089] [2020-12-01 15:58:47,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:58:47,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:58:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:58:47,330 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-12-01 15:58:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:47,568 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-12-01 15:58:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:58:47,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-01 15:58:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:47,581 INFO L225 Difference]: With dead ends: 51 [2020-12-01 15:58:47,581 INFO L226 Difference]: Without dead ends: 47 [2020-12-01 15:58:47,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:58:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-01 15:58:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-01 15:58:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-01 15:58:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-12-01 15:58:47,621 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-12-01 15:58:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:47,623 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-12-01 15:58:47,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:58:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-12-01 15:58:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 15:58:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:47,630 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] [2020-12-01 15:58:47,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:58:47,853 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-12-01 15:58:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:47,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713608945] [2020-12-01 15:58:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-01 15:58:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-01 15:58:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:58:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713608945] [2020-12-01 15:58:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802036757] [2020-12-01 15:58:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:58:48,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:58:48,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:48,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-12-01 15:58:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575886167] [2020-12-01 15:58:48,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:58:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:58:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:58:48,385 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-12-01 15:58:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:48,790 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-12-01 15:58:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:58:48,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-01 15:58:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:48,795 INFO L225 Difference]: With dead ends: 105 [2020-12-01 15:58:48,795 INFO L226 Difference]: Without dead ends: 63 [2020-12-01 15:58:48,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:58:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-01 15:58:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-01 15:58:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 15:58:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-12-01 15:58:48,814 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-12-01 15:58:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:48,815 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-12-01 15:58:48,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:58:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-12-01 15:58:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 15:58:48,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:48,819 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] [2020-12-01 15:58:49,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:58:49,045 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-12-01 15:58:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036657798] [2020-12-01 15:58:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-01 15:58:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036657798] [2020-12-01 15:58:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605212395] [2020-12-01 15:58:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:58:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:58:49,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:49,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-01 15:58:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473097408] [2020-12-01 15:58:49,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:58:49,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:58:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:58:49,597 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 14 states. [2020-12-01 15:58:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:50,250 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-12-01 15:58:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:58:50,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-01 15:58:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:50,263 INFO L225 Difference]: With dead ends: 177 [2020-12-01 15:58:50,263 INFO L226 Difference]: Without dead ends: 117 [2020-12-01 15:58:50,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:58:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-01 15:58:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-12-01 15:58:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-01 15:58:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-12-01 15:58:50,320 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-12-01 15:58:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:50,321 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-12-01 15:58:50,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:58:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-12-01 15:58:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-01 15:58:50,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:50,327 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] [2020-12-01 15:58:50,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:58:50,528 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-12-01 15:58:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701125694] [2020-12-01 15:58:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-01 15:58:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-01 15:58:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701125694] [2020-12-01 15:58:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003083615] [2020-12-01 15:58:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:58:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-01 15:58:51,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:51,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-01 15:58:51,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846268566] [2020-12-01 15:58:51,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:58:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:58:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:58:51,042 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 15 states. [2020-12-01 15:58:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:51,773 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-12-01 15:58:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-01 15:58:51,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-12-01 15:58:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:51,778 INFO L225 Difference]: With dead ends: 255 [2020-12-01 15:58:51,778 INFO L226 Difference]: Without dead ends: 155 [2020-12-01 15:58:51,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:58:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-01 15:58:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-12-01 15:58:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-01 15:58:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-12-01 15:58:51,856 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-12-01 15:58:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:51,858 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-12-01 15:58:51,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:58:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-12-01 15:58:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-01 15:58:51,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:51,878 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:52,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-01 15:58:52,105 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:52,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1606483269, now seen corresponding path program 1 times [2020-12-01 15:58:52,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:52,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987379120] [2020-12-01 15:58:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-01 15:58:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-01 15:58:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987379120] [2020-12-01 15:58:52,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223082693] [2020-12-01 15:58:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:58:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-01 15:58:53,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:53,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-12-01 15:58:53,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717416251] [2020-12-01 15:58:53,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:58:53,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:58:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:58:53,038 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 18 states. [2020-12-01 15:58:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:53,898 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2020-12-01 15:58:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-01 15:58:53,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-12-01 15:58:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:53,903 INFO L225 Difference]: With dead ends: 240 [2020-12-01 15:58:53,903 INFO L226 Difference]: Without dead ends: 107 [2020-12-01 15:58:53,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-12-01 15:58:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-01 15:58:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-12-01 15:58:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-01 15:58:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2020-12-01 15:58:53,929 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 107 [2020-12-01 15:58:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:53,930 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2020-12-01 15:58:53,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:58:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2020-12-01 15:58:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-01 15:58:53,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:53,935 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:54,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:58:54,136 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2067005783, now seen corresponding path program 1 times [2020-12-01 15:58:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:54,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788828596] [2020-12-01 15:58:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-01 15:58:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-12-01 15:58:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-01 15:58:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 67 proven. 169 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2020-12-01 15:58:54,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788828596] [2020-12-01 15:58:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616537463] [2020-12-01 15:58:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:58:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 54 proven. 149 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-12-01 15:58:55,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:55,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-12-01 15:58:55,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338423004] [2020-12-01 15:58:55,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 15:58:55,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 15:58:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:58:55,258 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 17 states. [2020-12-01 15:58:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:55,923 INFO L93 Difference]: Finished difference Result 169 states and 248 transitions. [2020-12-01 15:58:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-01 15:58:55,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 161 [2020-12-01 15:58:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:55,926 INFO L225 Difference]: With dead ends: 169 [2020-12-01 15:58:55,926 INFO L226 Difference]: Without dead ends: 93 [2020-12-01 15:58:55,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-12-01 15:58:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-01 15:58:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-12-01 15:58:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-01 15:58:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2020-12-01 15:58:55,942 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 161 [2020-12-01 15:58:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:55,943 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2020-12-01 15:58:55,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 15:58:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2020-12-01 15:58:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-01 15:58:55,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:55,946 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:56,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:58:56,161 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -625288554, now seen corresponding path program 2 times [2020-12-01 15:58:56,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:56,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109699605] [2020-12-01 15:58:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-12-01 15:58:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-12-01 15:58:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-12-01 15:58:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 113 proven. 114 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-01 15:58:56,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109699605] [2020-12-01 15:58:56,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728286693] [2020-12-01 15:58:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:56,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:58:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:58:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:58:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 79 proven. 131 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-12-01 15:58:57,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:57,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2020-12-01 15:58:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946878113] [2020-12-01 15:58:57,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:58:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:58:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:58:57,181 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand 20 states. [2020-12-01 15:58:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:57,942 INFO L93 Difference]: Finished difference Result 201 states and 327 transitions. [2020-12-01 15:58:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-01 15:58:57,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 148 [2020-12-01 15:58:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:57,949 INFO L225 Difference]: With dead ends: 201 [2020-12-01 15:58:57,949 INFO L226 Difference]: Without dead ends: 95 [2020-12-01 15:58:57,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-12-01 15:58:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-01 15:58:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-01 15:58:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-01 15:58:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-12-01 15:58:57,965 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 148 [2020-12-01 15:58:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:57,969 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-12-01 15:58:57,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:58:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-12-01 15:58:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-01 15:58:57,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:57,978 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:58:58,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-01 15:58:58,193 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:58:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:58:58,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1637409048, now seen corresponding path program 1 times [2020-12-01 15:58:58,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:58:58,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962575053] [2020-12-01 15:58:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:58:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:58:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:58:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-01 15:58:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-01 15:58:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:58:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:58:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:58:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 165 proven. 92 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-01 15:58:58,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962575053] [2020-12-01 15:58:58,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637771649] [2020-12-01 15:58:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:58:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:58:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:58:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:58:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-12-01 15:58:59,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:58:59,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 20 [2020-12-01 15:58:59,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960156746] [2020-12-01 15:58:59,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:58:59,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:58:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:58:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:58:59,191 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 20 states. [2020-12-01 15:58:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:58:59,837 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2020-12-01 15:58:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-01 15:58:59,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 147 [2020-12-01 15:58:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:58:59,841 INFO L225 Difference]: With dead ends: 120 [2020-12-01 15:58:59,842 INFO L226 Difference]: Without dead ends: 111 [2020-12-01 15:58:59,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-12-01 15:58:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-01 15:58:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-12-01 15:58:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-01 15:58:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-12-01 15:58:59,859 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 147 [2020-12-01 15:58:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:58:59,861 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-12-01 15:58:59,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:58:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-12-01 15:58:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-01 15:58:59,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:58:59,868 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:59:00,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:59:00,077 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:59:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:59:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2037516304, now seen corresponding path program 2 times [2020-12-01 15:59:00,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:59:00,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806634227] [2020-12-01 15:59:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:59:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:59:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:59:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-01 15:59:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-01 15:59:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:59:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-12-01 15:59:01,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806634227] [2020-12-01 15:59:01,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440167956] [2020-12-01 15:59:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:59:01,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:59:01,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:59:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-01 15:59:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:59:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-12-01 15:59:02,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:59:02,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-12-01 15:59:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331814521] [2020-12-01 15:59:02,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-01 15:59:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:59:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-01 15:59:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 15:59:02,949 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 36 states. [2020-12-01 15:59:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:59:03,446 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2020-12-01 15:59:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-01 15:59:03,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 174 [2020-12-01 15:59:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:59:03,448 INFO L225 Difference]: With dead ends: 112 [2020-12-01 15:59:03,448 INFO L226 Difference]: Without dead ends: 88 [2020-12-01 15:59:03,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 228 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 15:59:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-01 15:59:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-01 15:59:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-01 15:59:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-12-01 15:59:03,458 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 174 [2020-12-01 15:59:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:59:03,458 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-12-01 15:59:03,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-01 15:59:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-12-01 15:59:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-01 15:59:03,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:59:03,462 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:59:03,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:59:03,701 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:59:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:59:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1524602104, now seen corresponding path program 3 times [2020-12-01 15:59:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:59:03,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187415792] [2020-12-01 15:59:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:59:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:03,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:59:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:03,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:03,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:03,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:59:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-01 15:59:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-12-01 15:59:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-12-01 15:59:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:59:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-01 15:59:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:59:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:59:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:59:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 155 proven. 209 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2020-12-01 15:59:04,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187415792] [2020-12-01 15:59:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126485495] [2020-12-01 15:59:04,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/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 [2020-12-01 15:59:04,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-01 15:59:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:59:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:59:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:59:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 118 proven. 254 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2020-12-01 15:59:04,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:59:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2020-12-01 15:59:04,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752691641] [2020-12-01 15:59:04,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-01 15:59:04,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:59:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-01 15:59:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:59:04,904 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 19 states. [2020-12-01 15:59:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:59:05,201 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2020-12-01 15:59:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:59:05,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-12-01 15:59:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:59:05,203 INFO L225 Difference]: With dead ends: 145 [2020-12-01 15:59:05,204 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 15:59:05,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:59:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 15:59:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 15:59:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 15:59:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 15:59:05,206 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-12-01 15:59:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:59:05,207 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:59:05,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-01 15:59:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:59:05,207 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 15:59:05,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 15:59:05,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-01 15:59:06,483 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 25 [2020-12-01 15:59:07,061 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2020-12-01 15:59:07,232 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 6 [2020-12-01 15:59:07,236 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-01 15:59:07,237 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-01 15:59:07,237 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-01 15:59:07,237 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-01 15:59:07,237 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-12-01 15:59:07,238 INFO L258 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (<= 6 ULTIMATE.start_main_~x~0) [2020-12-01 15:59:07,238 INFO L262 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-12-01 15:59:07,238 INFO L262 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-12-01 15:59:07,239 INFO L258 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 6) (<= 6 ULTIMATE.start_main_~x~0)) [2020-12-01 15:59:07,239 INFO L262 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-12-01 15:59:07,239 INFO L262 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-12-01 15:59:07,239 INFO L262 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-12-01 15:59:07,239 INFO L265 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-12-01 15:59:07,240 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-12-01 15:59:07,240 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-01 15:59:07,240 INFO L258 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#in~n| 3) .cse0) (and (<= |fibo2_#t~ret9| 3) (<= 3 |fibo2_#t~ret9|) .cse0))) (or (not (<= |fibo2_#in~n| 4)) (and (<= |fibo2_#t~ret9| 1) (<= 1 |fibo2_#t~ret9|))) (not (<= |fibo2_#in~n| 1))) [2020-12-01 15:59:07,240 INFO L262 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-12-01 15:59:07,241 INFO L262 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-12-01 15:59:07,241 INFO L262 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-12-01 15:59:07,241 INFO L262 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-12-01 15:59:07,241 INFO L262 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-12-01 15:59:07,241 INFO L265 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-12-01 15:59:07,241 INFO L258 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-12-01 15:59:07,242 INFO L262 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-01 15:59:07,242 INFO L258 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= |fibo1_#in~n| 3) (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1)) (<= 5 |fibo1_#in~n|) (and (<= 4 |fibo1_#in~n|) (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 5) .cse0) (and (<= 5 |fibo1_#t~ret7|) .cse0 (<= |fibo1_#t~ret7| 5)) (and (<= 7 |fibo1_#in~n|) .cse0)))) [2020-12-01 15:59:07,242 INFO L262 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-12-01 15:59:07,242 INFO L262 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-12-01 15:59:07,243 INFO L262 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-12-01 15:59:07,243 INFO L262 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-12-01 15:59:07,243 INFO L262 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-12-01 15:59:07,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:59:07 BoogieIcfgContainer [2020-12-01 15:59:07,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:59:07,263 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:59:07,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:59:07,264 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:59:07,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:58:44" (3/4) ... [2020-12-01 15:59:07,270 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 15:59:07,279 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-12-01 15:59:07,279 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-12-01 15:59:07,286 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-01 15:59:07,286 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-01 15:59:07,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 15:59:07,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 15:59:07,343 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ba00e88d-2135-4baf-aa9d-2877ffed372d/bin/uautomizer/witness.graphml [2020-12-01 15:59:07,354 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:59:07,356 INFO L168 Benchmark]: Toolchain (without parser) took 23225.79 ms. Allocated memory was 88.1 MB in the beginning and 337.6 MB in the end (delta: 249.6 MB). Free memory was 57.3 MB in the beginning and 228.4 MB in the end (delta: -171.1 MB). Peak memory consumption was 77.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,356 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 88.1 MB. Free memory was 47.4 MB in the beginning and 47.3 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:59:07,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.67 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 66.5 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.41 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:59:07,358 INFO L168 Benchmark]: Boogie Preprocessor took 26.54 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 64.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,359 INFO L168 Benchmark]: RCFGBuilder took 395.42 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 51.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,360 INFO L168 Benchmark]: TraceAbstraction took 22308.65 ms. Allocated memory was 88.1 MB in the beginning and 337.6 MB in the end (delta: 249.6 MB). Free memory was 51.1 MB in the beginning and 230.5 MB in the end (delta: -179.4 MB). Peak memory consumption was 154.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,361 INFO L168 Benchmark]: Witness Printer took 90.79 ms. Allocated memory is still 337.6 MB. Free memory was 230.5 MB in the beginning and 228.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:59:07,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 88.1 MB. Free memory was 47.4 MB in the beginning and 47.3 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.67 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 66.5 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.41 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.54 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 64.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 395.42 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 51.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22308.65 ms. Allocated memory was 88.1 MB in the beginning and 337.6 MB in the end (delta: 249.6 MB). Free memory was 51.1 MB in the beginning and 230.5 MB in the end (delta: -179.4 MB). Peak memory consumption was 154.9 MB. Max. memory is 16.1 GB. * Witness Printer took 90.79 ms. Allocated memory is still 337.6 MB. Free memory was 230.5 MB in the beginning and 228.4 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: 6 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.3s, OverallIterations: 13, TraceHistogramMax: 15, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 374 SDtfs, 563 SDslu, 3368 SDs, 0 SdLazy, 3761 SolverSat, 575 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1682 GetRequests, 1415 SyntacticMatches, 16 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, 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, 116 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 404 PreInvPairs, 554 NumberOfFragments, 122 HoareAnnotationTreeSize, 404 FomulaSimplifications, 2591 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3877 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 2239 NumberOfCodeBlocks, 2239 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2215 ConstructedInterpolants, 0 QuantifiedInterpolants, 649535 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2778 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 6102/8050 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...